| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 |
4.3%
|
|
| 3 | 1 |
0.3%
|
|
| 4 | 3 |
0.9%
|
|
| 5 | 15 |
4.3%
|
|
| 6 | 2 |
0.6%
|
|
| 7 | 4 |
1.1%
|
|
| 999 | 5 |
1.4%
|
|
| Missing value | 304 |
87.1%
|