| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1898 |
86.7%
|
| 2 | Once | 99 |
4.5%
|
| 3 | Twice | 59 |
2.7%
|
| 4 | 3-5 times | 54 |
2.5%
|
| 5 | 6-10 times | 21 |
1%
|
| 6 | 11-20 times | 12 |
0.5%
|
| 7 | More than 20 times | 33 |
1.5%
|
| 8 | Not applicable | 11 |
0.5%
|
| Sysmiss | 1 |