| Value | Category | Cases | |
|---|---|---|---|
| 1 | 20 | 15 |
0.8%
|
| 2 | 30 | 8 |
0.4%
|
| 3 | 40 | 23 |
1.3%
|
| 4 | 50 | 13 |
0.7%
|
| 5 | 60 | 1 |
0.1%
|
| 6 | 70 | 1 |
0.1%
|
| 7 | 100 | 4 |
0.2%
|
| 8 | 260 | 1 |
0.1%
|
| Missing value | 1729 |
96.3%
|