| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
0.4%
|
|
| -97 | 3 |
0.2%
|
|
| 0 | 308 |
19.6%
|
|
| 1 | 40 |
2.5%
|
|
| 2 | 102 |
6.5%
|
|
| 3 | 90 |
5.7%
|
|
| 4 | 73 |
4.6%
|
|
| 5 | 38 |
2.4%
|
|
| 6 | 2 |
0.1%
|
|
| 7 | 332 |
21.1%
|
|
| Missing value | 580 |
36.8%
|