| Value | Category | Cases | |
|---|---|---|---|
| 0 | 11 |
1.5%
|
|
| 1 | 462 |
63.9%
|
|
| 2 | 179 |
24.8%
|
|
| 3 | 53 |
7.3%
|
|
| 4 | 16 |
2.2%
|
|
| 7 | 1 |
0.1%
|
|
| 8 | 1 |
0.1%
|
|
| Sysmiss | 2009 |