| Value | Category | Cases | |
|---|---|---|---|
| 0 | 297 |
84.4%
|
|
| 1 | 31 |
8.8%
|
|
| 2 | 15 |
4.3%
|
|
| 3 | 6 |
1.7%
|
|
| 4 | 1 |
0.3%
|
|
| 5 | 1 |
0.3%
|
|
| 20 | 1 |
0.3%
|
|
| Sysmiss | 18 |