| Value | Category | Cases | |
|---|---|---|---|
| 0 | no prior child | 9984 |
53.2%
|
| 1 | 4850 |
25.9%
|
|
| 2 | 2834 |
15.1%
|
|
| 3 | 908 |
4.8%
|
|
| 4 | 162 |
0.9%
|
|
| 5 | 15 |
0.1%
|
|
| 6 | 1 |
0%
|