| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 2910 |
64.6%
|
| 2 | Once | 119 |
2.6%
|
| 3 | Twice | 59 |
1.3%
|
| 4 | 3-5 times | 54 |
1.2%
|
| 5 | 6-10 times | 18 |
0.4%
|
| 6 | 11-20 times | 8 |
0.2%
|
| 7 | More than 20 times | 65 |
1.4%
|
| 8 | Not applicable | 1232 |
27.3%
|
| Sysmiss | 41 |