| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1918 |
96.5%
|
| 2 | Once | 37 |
1.9%
|
| 3 | Twice | 11 |
0.6%
|
| 4 | 3-5 times | 12 |
0.6%
|
| 5 | 6-10 times | 2 |
0.1%
|
| 6 | 11-20 times | 0 |
0%
|
| 7 | More than 20 times | 5 |
0.3%
|
| Sysmiss | 3 |