| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1829 |
55.2%
|
| 2 | Once | 240 |
7.2%
|
| 3 | Twice | 290 |
8.8%
|
| 4 | Three times | 191 |
5.8%
|
| 5 | More than three times | 426 |
12.9%
|
| 6 | Too often to remember | 271 |
8.2%
|
| 8 | Refused to answer | 64 |
1.9%
|
| Sysmiss | 10 |