| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1176 |
53.7%
|
| 2 | Once | 39 |
1.8%
|
| 3 | Twice | 41 |
1.9%
|
| 4 | 3-5 times | 35 |
1.6%
|
| 5 | 6-10 times | 17 |
0.8%
|
| 6 | 11-20 times | 9 |
0.4%
|
| 7 | More than 20 times | 13 |
0.6%
|
| 8 | Not applicable | 852 |
38.9%
|
| Sysmiss | 6 |