Strata
Datafiles
| Valid Observations | 391 |
| Valid Observations | 718 |
| Valid Observations | 12818 |
| Valid Observations | 12680 |
| Valid Observations | 11968 |
| Valid Observations | 12035 |
| Valid Observations | 12876 |
| Valid Observations | 13754 |
| Valid Observations | 14123 |
| Valid Observations | 14811 |
| Valid Observations | 17761 |
| Valid Observations | 44067 |
