| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
0.2%
|
| 0 | 454 |
94.2%
|
|
| 5 | 1 |
0.2%
|
|
| 10 | 10 |
2.1%
|
|
| 20 | 7 |
1.5%
|
|
| 25 | 2 |
0.4%
|
|
| 30 | 4 |
0.8%
|
|
| 40 | 1 |
0.2%
|
|
| 50 | 1 |
0.2%
|
|
| 60 | 1 |
0.2%
|