| Value | Category | Cases | |
|---|---|---|---|
| 0 | nr | 0 |
0%
|
| 1 | yes | 229 |
23.1%
|
| 2 | no | 760 |
76.7%
|
| 3 | 2 |
0.2%
|
|
| 9 | na | 0 |
0%
|
| Sysmiss | 2009 |