| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1903 |
57.5%
|
| 2 | Once | 227 |
6.9%
|
| 3 | Twice | 267 |
8.1%
|
| 4 | Three times | 183 |
5.5%
|
| 5 | More than three times | 421 |
12.7%
|
| 6 | Too often to remember | 238 |
7.2%
|
| 8 | Refused to answer | 72 |
2.2%
|
| Sysmiss | 10 |