| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 1379 |
81.4%
|
| 2 | One | 180 |
10.6%
|
| 3 | Twice | 68 |
4%
|
| 4 | 3 to 6 times | 31 |
1.8%
|
| 5 | 7 to 9 times | 12 |
0.7%
|
| 6 | 10 or more times | 25 |
1.5%
|
| Sysmiss | 38 |