| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 620 |
51.7%
|
| 1 | Just once or twice | 314 |
26.2%
|
| 2 | Several times | 171 |
14.3%
|
| 3 | Many times | 72 |
6%
|
| 4 | Always | 22 |
1.8%
|
| 9 | Don't Know [DNR] | 1 |
0.1%
|
| 998 | Refused | 0 |
0%
|
| 999 | Don't know | 0 |
0%
|