| Value | Category | Cases | |
|---|---|---|---|
| 0 | First birth | 22012 |
26.7%
|
| 1 | <2 years | 25154 |
30.5%
|
| 2 | 2 years | 20741 |
25.1%
|
| 3 | 3 years | 7711 |
9.3%
|
| 4 | 4+ years | 6858 |
8.3%
|