| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 1995 |
91.3%
|
| 2 | 1 or 2 times | 91 |
4.2%
|
| 3 | 3 to 9 times | 48 |
2.2%
|
| 4 | 10 or more times | 51 |
2.3%
|
| Sysmiss | 12 |