| value | category | cases | |
|---|---|---|---|
| 0 | no prior child | 4067 |
10.7%
|
| 1 | 10119 |
26.6%
|
|
| 2 | 9853 |
25.9%
|
|
| 3 | 10696 |
28.2%
|
|
| 4 | 2966 |
7.8%
|
|
| 5 | 243 |
0.6%
|
|
| 6 | 40 |
0.1%
|