| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.2%
|
|
| 1 | Yes | 180 |
36.4%
|
| 2 | No | 312 |
63.2%
|
| 9 | missing | 1 |
0.2%
|
| Sysmiss | 351 |