| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 2913 |
80.6%
|
| 2 | 1 or 2 times | 626 |
17.3%
|
| 3 | 3 to 9 times | 53 |
1.5%
|
| 4 | 10 or more times | 20 |
0.6%
|
| Sysmiss | 71 |