| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 1977 |
96.4%
|
| 2 | 1 or 2 times | 37 |
1.8%
|
| 3 | 3 to 9 times | 15 |
0.7%
|
| 4 | 10 to 19 times | 14 |
0.7%
|
| 5 | 20 or more times | 8 |
0.4%
|
| Sysmiss | 71 |