| Value | Category | Cases | |
|---|---|---|---|
| 0 | no prior child | 3928 |
47.7%
|
| 2 | 2362 |
28.7%
|
|
| 3 | 1496 |
18.2%
|
|
| 4 | 393 |
4.8%
|
|
| 5 | 49 |
0.6%
|
|
| 6 | 4 |
0%
|