| Value | Category | Cases | |
|---|---|---|---|
| 0 | First birth | 0 |
0%
|
| 1 | <2 years | 4611 |
46.9%
|
| 2 | 2 years | 1922 |
19.6%
|
| 3 | 3 years | 1132 |
11.5%
|
| 4 | 4+ years | 2165 |
22%
|