| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1254 |
63.1%
|
| 2 | Once | 69 |
3.5%
|
| 3 | Twice | 144 |
7.2%
|
| 4 | 3-5 times | 166 |
8.4%
|
| 5 | 6-10 times | 117 |
5.9%
|
| 6 | 11-20 times | 77 |
3.9%
|
| 7 | More than 20 times | 158 |
7.9%
|
| Sysmiss | 3 |