| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1928 |
97%
|
| 2 | Once | 17 |
0.9%
|
| 3 | Twice | 14 |
0.7%
|
| 4 | 3-5 times | 10 |
0.5%
|
| 5 | 6-10 times | 11 |
0.6%
|
| 6 | 11-20 times | 2 |
0.1%
|
| 7 | More than 20 times | 3 |
0.2%
|
| Sysmiss | 3 |