| Value | Category | Cases | |
|---|---|---|---|
| 1 | Regular | 197 |
9.5%
|
| 2 | Irregular | 543 |
26.2%
|
| 3 | Very irregular | 1226 |
59.2%
|
| 4 | 105 |
5.1%
|
|
| 0 | NR | 66 | |
| 9 | 20 | ||
| Sysmiss | 843 |