| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 20 |
0.8%
|
| 2 | 1 or 2 | 81 |
3.4%
|
| 3 | 3 to 5 | 622 |
26.1%
|
| 4 | 6 to 8 | 720 |
30.3%
|
| 5 | 9 or 10 | 769 |
32.3%
|
| 99 | I don't know | 168 |
7.1%
|
| Sysmiss | 947 |