| Value | Category | Cases | |
|---|---|---|---|
| 0 | 225 |
43.3%
|
|
| 2 | 1 |
0.2%
|
|
| 10 | 21 |
4%
|
|
| 15 | 17 |
3.3%
|
|
| 16 | 1 |
0.2%
|
|
| 20 | 48 |
9.2%
|
|
| 25 | 5 |
1%
|
|
| 30 | 141 |
27.1%
|
|
| 32 | 1 |
0.2%
|
|
| 33 | 1 |
0.2%
|
|
| 35 | 3 |
0.6%
|
|
| 40 | 29 |
5.6%
|
|
| 45 | 9 |
1.7%
|
|
| 50 | 13 |
2.5%
|
|
| 55 | 1 |
0.2%
|
|
| 77 | Don't know | 4 |
0.8%
|
| Sysmiss | 3435 |