| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 1990 |
87.3%
|
| 2 | 1 or 2 times | 194 |
8.5%
|
| 3 | 3 to 9 times | 64 |
2.8%
|
| 4 | 10 or more times | 31 |
1.4%
|
| Sysmiss | 76 |