| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't know | 6 |
0.4%
|
| 0 | Not taken | 1323 |
97.9%
|
| 1 | 1-7 times | 17 |
1.3%
|
| 2 | 8 or more times | 6 |
0.4%
|
| Sysmiss | 1805 |