| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 3555 |
80.5%
|
| 2 | Once | 120 |
2.7%
|
| 3 | Twice | 175 |
4%
|
| 4 | 3-5 times | 242 |
5.5%
|
| 5 | 6-10 times | 121 |
2.7%
|
| 6 | 11-20 times | 69 |
1.6%
|
| 7 | More than 20 times | 118 |
2.7%
|
| 8 | Not applicable | 11 |
0.2%
|
| Sysmiss | 6 |