| Value | Category | Cases | |
|---|---|---|---|
| 0 | nr | 0 |
0%
|
| 1 | regular | 403 |
19.7%
|
| 2 | irregular | 1260 |
61.7%
|
| 3 | very irregular | 366 |
17.9%
|
| 4 | 11 |
0.5%
|
|
| 5 | 1 |
0%
|
|
| 6 | 1 |
0%
|
|
| 13 | 1 |
0%
|
|
| Sysmiss | 957 |