| Value | Category | Cases | |
|---|---|---|---|
| -2 | Refusal to answer | 0 |
0%
|
| -1 | Don't know | 1 |
0.1%
|
| 0 | 1040 |
99.7%
|
|
| 2 | 2 |
0.2%
|
|
| Sysmiss | 1590 |