| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 71 |
18.6%
|
| 2 | Twice | 49 |
12.8%
|
| 3 | Three times | 16 |
4.2%
|
| 4 | Four times | 2 |
0.5%
|
| 5 | More | 18 |
4.7%
|
| 6 | Never | 64 |
16.8%
|
| 7 | Not Applicable | 162 |
42.4%
|
| Sysmiss | 17170 |