| Value | Category | Cases | |
|---|---|---|---|
| 0 | First birth | 7721 |
33.8%
|
| 1 | <2 years | 1720 |
7.5%
|
| 2 | 2 years | 3870 |
16.9%
|
| 3 | 3 years | 3211 |
14.1%
|
| 4 | 4+ years | 6322 |
27.7%
|