| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than 3 | 153 |
4.9%
|
| 2 | 3-6 | 346 |
11.1%
|
| 3 | 6-12 | 744 |
23.8%
|
| 4 | more than 12 | 1884 |
60.2%
|
| Sysmiss | 8988 |