| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 9 |
0.1%
|
| 2 | Twice | 1 |
0%
|
| 3 | Three times | 1 |
0%
|
| 4 | Four times | 4 |
0%
|
| 5 | More | 8 |
0.1%
|
| 6 | Never | 711 |
4.7%
|
| 7 | Not Applicable | 14342 |
95.1%
|
| Sysmiss | 1251 |