| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 2013 |
89.7%
|
| 2 | 1 or 2 times | 186 |
8.3%
|
| 3 | 3 to 9 times | 28 |
1.2%
|
| 4 | 10 or more times | 17 |
0.8%
|
| Sysmiss | 5 |