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Mainstage Variable

ypdobm

date of birth: month

This variable is only available in the Special Licence (SN 6931) and Secure Access (SN 6676) datasets.

Datafile

youth

Index terms

Value label	Value	Absolute frequency	Relative frequency
refusal	-2	4	0.25%
January	1	155	9.55%
February	2	122	7.52%
March	3	136	8.38%
April	4	133	8.19%
May	5	135	8.32%
June	6	131	8.07%
July	7	103	6.35%
August	8	147	9.06%
September	9	149	9.18%
October	10	133	8.19%
November	11	140	8.63%
December	12	135	8.32%
	Total	1623	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.5	4	1.0	12.0	3.5	1619

Value label	Value	Absolute frequency	Relative frequency
January	1	142	8.04%
February	2	128	7.25%
March	3	155	8.78%
April	4	143	8.1%
May	5	120	6.8%
June	6	140	7.93%
July	7	166	9.4%
August	8	145	8.21%
September	9	178	10.08%
October	10	152	8.61%
November	11	150	8.49%
December	12	147	8.32%
	Total	1766	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.64	0	1.0	12.0	3.43	1766

Value label	Value	Absolute frequency	Relative frequency
January	1	137	8.24%
February	2	113	6.79%
March	3	144	8.66%
April	4	138	8.3%
May	5	130	7.82%
June	6	121	7.28%
July	7	138	8.3%
August	8	147	8.84%
September	9	153	9.2%
October	10	140	8.42%
November	11	140	8.42%
December	12	162	9.74%
	Total	1663	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.69	0	1.0	12.0	3.48	1663

Value label	Value	Absolute frequency	Relative frequency
January	1	183	8.71%
February	2	149	7.1%
March	3	180	8.57%
April	4	167	7.95%
May	5	144	6.86%
June	6	171	8.14%
July	7	178	8.48%
August	8	178	8.48%
September	9	186	8.86%
October	10	207	9.86%
November	11	171	8.14%
December	12	186	8.86%
	Total	2100	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.65	0	1.0	12.0	3.48	2100

Value label	Value	Absolute frequency	Relative frequency
January	1	198	7.9%
February	2	184	7.34%
March	3	186	7.42%
April	4	216	8.62%
May	5	185	7.38%
June	6	192	7.66%
July	7	230	9.18%
August	8	225	8.98%
September	9	224	8.94%
October	10	225	8.98%
November	11	213	8.5%
December	12	228	9.1%
	Total	2506	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.71	0	1.0	12.0	3.44	2506

Value label	Value	Absolute frequency	Relative frequency
January	1	259	9.18%
February	2	206	7.3%
March	3	214	7.59%
April	4	221	7.83%
May	5	235	8.33%
June	6	220	7.8%
July	7	246	8.72%
August	8	220	7.8%
September	9	267	9.46%
October	10	266	9.43%
November	11	215	7.62%
December	12	252	8.93%
	Total	2821	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.6	0	1.0	12.0	3.47	2821

Value label	Value	Absolute frequency	Relative frequency
missing	-9	1	0.03%
January	1	281	8.59%
February	2	271	8.28%
March	3	259	7.92%
April	4	254	7.76%
May	5	236	7.21%
June	6	271	8.28%
July	7	284	8.68%
August	8	278	8.5%
September	9	306	9.35%
October	10	287	8.77%
November	11	259	7.92%
December	12	285	8.71%
	Total	3272	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.58	1	1.0	12.0	3.47	3271

Value label	Value	Absolute frequency	Relative frequency
January	1	311	8.57%
February	2	309	8.51%
March	3	262	7.22%
April	4	295	8.13%
May	5	279	7.69%
June	6	284	7.82%
July	7	306	8.43%
August	8	301	8.29%
September	9	352	9.7%
October	10	331	9.12%
November	11	279	7.69%
December	12	321	8.84%
	Total	3630	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.6	0	1.0	12.0	3.47	3630

Value label	Value	Absolute frequency	Relative frequency
January	1	310	8.96%
February	2	269	7.77%
March	3	268	7.74%
April	4	262	7.57%
May	5	272	7.86%
June	6	270	7.8%
July	7	321	9.27%
August	8	295	8.52%
September	9	334	9.65%
October	10	299	8.64%
November	11	263	7.6%
December	12	298	8.61%
	Total	3461	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.57	0	1.0	12.0	3.45	3461

Value label	Value	Absolute frequency	Relative frequency
January	1	301	8.24%
February	2	307	8.4%
March	3	256	7.0%
April	4	314	8.59%
May	5	324	8.86%
June	6	289	7.91%
July	7	341	9.33%
August	8	318	8.7%
September	9	314	8.59%
October	10	272	7.44%
November	11	297	8.13%
December	12	322	8.81%
	Total	3655	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.54	0	1.0	12.0	3.43	3655

Value label	Value	Absolute frequency	Relative frequency
January	1	345	8.53%
February	2	344	8.5%
March	3	292	7.22%
April	4	337	8.33%
May	5	343	8.48%
June	6	321	7.94%
July	7	346	8.55%
August	8	365	9.02%
September	9	347	8.58%
October	10	326	8.06%
November	11	333	8.23%
December	12	346	8.55%
	Total	4045	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.54	0	1.0	12.0	3.45	4045

Value label	Value	Absolute frequency	Relative frequency
January	1	360	8.13%
February	2	363	8.2%
March	3	351	7.93%
April	4	356	8.04%
May	5	405	9.15%
June	6	360	8.13%
July	7	388	8.76%
August	8	374	8.45%
September	9	362	8.18%
October	10	366	8.27%
November	11	377	8.52%
December	12	365	8.24%
	Total	4427	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.53	0	1.0	12.0	3.43	4427

Value label	Value	Absolute frequency	Relative frequency
January	1	431	8.59%
February	2	398	7.93%
March	3	382	7.61%
April	4	401	7.99%
May	5	445	8.87%
June	6	409	8.15%
July	7	427	8.51%
August	8	457	9.11%
September	9	431	8.59%
October	10	423	8.43%
November	11	401	7.99%
December	12	412	8.21%
	99	1	0.02%
	Total	5018	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.55	0	1.0	99.0	3.67	5018

Value label	Value	Absolute frequency	Relative frequency
refusal	-2	12	0.24%
don't know	-1	5	0.1%
January	1	441	9.0%
February	2	375	7.65%
March	3	386	7.88%
April	4	400	8.16%
May	5	436	8.9%
June	6	395	8.06%
July	7	420	8.57%
August	8	410	8.37%
September	9	420	8.57%
October	10	415	8.47%
November	11	372	7.59%
December	12	412	8.41%
	Total	4899	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.49	17	1.0	12.0	3.45	4882

Value label	Value	Absolute frequency	Relative frequency
january	1	116	9.49%
february	2	85	6.96%
march	3	102	8.35%
april	4	114	9.33%
may	5	109	8.92%
june	6	96	7.86%
july	7	96	7.86%
august	8	108	8.84%
september	9	114	9.33%
october	10	92	7.53%
november	11	89	7.28%
december	12	101	8.27%
	Total	1222	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.42	0	1.0	12.0	3.44	1222

Value label	Value	Absolute frequency	Relative frequency
january	1	118	9.48%
february	2	87	6.99%
march	3	120	9.64%
april	4	114	9.16%
may	5	109	8.76%
june	6	95	7.63%
july	7	100	8.03%
august	8	109	8.76%
september	9	102	8.19%
october	10	105	8.43%
november	11	96	7.71%
december	12	90	7.23%
	Total	1245	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.34	0	1.0	12.0	3.43	1245

Value label	Value	Absolute frequency	Relative frequency
january	1	115	8.46%
february	2	104	7.65%
march	3	132	9.71%
april	4	121	8.9%
may	5	119	8.75%
june	6	104	7.65%
july	7	119	8.75%
august	8	111	8.16%
september	9	109	8.01%
october	10	115	8.46%
november	11	108	7.94%
december	12	103	7.57%
	Total	1360	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.4	0	1.0	12.0	3.42	1360

Value label	Value	Absolute frequency	Relative frequency
january	1	113	8.0%
february	2	110	7.78%
march	3	125	8.85%
april	4	142	10.05%
may	5	111	7.86%
june	6	106	7.5%
july	7	131	9.27%
august	8	128	9.06%
september	9	111	7.86%
october	10	118	8.35%
november	11	110	7.78%
december	12	108	7.64%
	Total	1413	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.44	0	1.0	12.0	3.4	1413

Value label	Value	Absolute frequency	Relative frequency
january	1	111	7.95%
february	2	106	7.59%
march	3	121	8.66%
april	4	126	9.02%
may	5	120	8.59%
june	6	104	7.44%
july	7	120	8.59%
august	8	141	10.09%
september	9	105	7.52%
october	10	114	8.16%
november	11	123	8.8%
december	12	106	7.59%
	Total	1397	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.51	0	1.0	12.0	3.4	1397

Value label	Value	Absolute frequency	Relative frequency
january	1	103	8.45%
february	2	99	8.12%
march	3	113	9.27%
april	4	101	8.29%
may	5	91	7.47%
june	6	88	7.22%
july	7	104	8.53%
august	8	111	9.11%
september	9	96	7.88%
october	10	101	8.29%
november	11	115	9.43%
december	12	97	7.96%
	Total	1219	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.52	0	1.0	12.0	3.48	1219

Value label	Value	Absolute frequency	Relative frequency
january	1	94	7.35%
february	2	99	7.74%
march	3	130	10.16%
april	4	96	7.51%
may	5	96	7.51%
june	6	98	7.66%
july	7	112	8.76%
august	8	105	8.21%
september	9	103	8.05%
october	10	112	8.76%
november	11	119	9.3%
december	12	115	8.99%
	Total	1279	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.64	0	1.0	12.0	3.47	1279

Value label	Value	Absolute frequency	Relative frequency
january	1	120	8.49%
february	2	114	8.07%
march	3	133	9.41%
april	4	100	7.08%
may	5	95	6.72%
june	6	115	8.14%
july	7	121	8.56%
august	8	124	8.78%
september	9	130	9.2%
october	10	114	8.07%
november	11	126	8.92%
december	12	121	8.56%
	Total	1413	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.58	0	1.0	12.0	3.49	1413

Value label	Value	Absolute frequency	Relative frequency
january	1	122	8.63%
february	2	109	7.71%
march	3	138	9.76%
april	4	95	6.72%
may	5	106	7.5%
june	6	124	8.77%
july	7	132	9.34%
august	8	115	8.13%
september	9	126	8.91%
october	10	103	7.28%
november	11	119	8.42%
december	12	125	8.84%
	Total	1414	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.52	0	1.0	12.0	3.47	1414

Value label	Value	Absolute frequency	Relative frequency
january	1	92	9.81%
february	2	75	8.0%
march	3	99	10.55%
april	4	61	6.5%
may	5	70	7.46%
june	6	75	8.0%
july	7	82	8.74%
august	8	80	8.53%
september	9	90	9.59%
october	10	70	7.46%
november	11	63	6.72%
december	12	81	8.64%
	Total	938	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.37	0	1.0	12.0	3.49	938

Value label	Value	Absolute frequency	Relative frequency
january	1	93	9.83%
february	2	67	7.08%
march	3	93	9.83%
april	4	65	6.87%
may	5	70	7.4%
june	6	81	8.56%
july	7	83	8.77%
august	8	73	7.72%
september	9	97	10.25%
october	10	77	8.14%
november	11	62	6.55%
december	12	85	8.99%
	Total	946	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.46	0	1.0	12.0	3.48	946

Value label	Value	Absolute frequency	Relative frequency
january	1	71	9.86%
february	2	55	7.64%
march	3	67	9.31%
april	4	48	6.67%
may	5	55	7.64%
june	6	63	8.75%
july	7	76	10.56%
august	8	51	7.08%
september	9	74	10.28%
october	10	57	7.92%
november	11	43	5.97%
december	12	60	8.33%
	Total	720	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.38	0	1.0	12.0	3.44	720

Value label	Value	Absolute frequency	Relative frequency
january	1	78	10.43%
february	2	54	7.22%
march	3	69	9.22%
april	4	54	7.22%
may	5	58	7.75%
june	6	62	8.29%
july	7	74	9.89%
august	8	55	7.35%
september	9	73	9.76%
october	10	59	7.89%
november	11	46	6.15%
december	12	66	8.82%
	Total	748	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.38	0	1.0	12.0	3.48	748

Value label	Value	Absolute frequency	Relative frequency
january	1	67	8.95%
february	2	55	7.34%
march	3	68	9.08%
april	4	64	8.54%
may	5	62	8.28%
june	6	62	8.28%
july	7	68	9.08%
august	8	59	7.88%
september	9	73	9.75%
october	10	56	7.48%
november	11	52	6.94%
december	12	63	8.41%
	Total	749	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.42	0	1.0	12.0	3.43	749

Value label	Value	Absolute frequency	Relative frequency
january	1	59	7.63%
february	2	57	7.37%
march	3	68	8.8%
april	4	72	9.31%
may	5	65	8.41%
june	6	63	8.15%
july	7	69	8.93%
august	8	56	7.24%
september	9	69	8.93%
october	10	69	8.93%
november	11	64	8.28%
december	12	62	8.02%
	Total	773	100.0%

Mean	Number Missing	Min	Max	Std Dev	N
6.54	0	1.0	12.0	3.41	773

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The Economic and Social Research Council is the primary funder of the study
The Study is led by a team at the Institute for Social and Economic Research (ISER) at the University of Essex.