| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 4215 |
93.5%
|
| 2 | Once | 110 |
2.4%
|
| 3 | Twice | 46 |
1%
|
| 4 | 3-5 times | 33 |
0.7%
|
| 5 | 6-10 times | 18 |
0.4%
|
| 6 | 11-20 times | 8 |
0.2%
|
| 7 | More than 20 times | 29 |
0.6%
|
| 8 | Not applicable | 10 |
0.2%
|
| Sysmiss | 37 |