| Value | Category | Cases | |
|---|---|---|---|
| 1 | -99 | 4 |
0.4%
|
| 2 | -97 | 1 |
0.1%
|
| 3 | 0 | 3 |
0.3%
|
| 4 | 1 | 25 |
2.8%
|
| 5 | 2 | 21 |
2.3%
|
| 6 | 3 | 24 |
2.7%
|
| 7 | 4 | 114 |
12.6%
|
| Missing value | 711 |
78.7%
|