| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1705 |
85.8%
|
| 2 | Once | 63 |
3.2%
|
| 3 | Twice | 61 |
3.1%
|
| 4 | 3-5 times | 35 |
1.8%
|
| 5 | 6-10 times | 33 |
1.7%
|
| 6 | 11-20 times | 14 |
0.7%
|
| 7 | More than 20 times | 74 |
3.7%
|
| Sysmiss | 3 |