| Value | Category | Cases | |
|---|---|---|---|
| 1 | once | 5 |
0.3%
|
| 2 | twice | 2 |
0.1%
|
| 3 | 3-5 times | 6 |
0.4%
|
| 4 | 6-10 times | 3 |
0.2%
|
| 5 | 11-20 times | 2 |
0.1%
|
| 6 | more than 20 times | 8 |
0.5%
|
| 7 | not in past year, but happened before | 36 |
2.4%
|
| 8 | never happened | 1441 |
95.9%
|
| Sysmiss | 994 |