| Value | Category | Cases | |
|---|---|---|---|
| 1 | once | 2 |
0.1%
|
| 2 | twice | 2 |
0.1%
|
| 3 | 3-5 times | 0 |
0%
|
| 4 | 6-10 times | 3 |
0.2%
|
| 5 | 11-20 times | 1 |
0.1%
|
| 6 | more than 20 times | 0 |
0%
|
| 7 | not in past year, but happened before | 24 |
1.6%
|
| 8 | never happened | 1475 |
97.9%
|
| Sysmiss | 990 |