| Value | Category | Cases | |
|---|---|---|---|
| 0 | 804 |
71.5%
|
|
| 1 | 1 |
0.1%
|
|
| 4 | 1 |
0.1%
|
|
| 9 | 1 |
0.1%
|
|
| 10 | 22 |
2%
|
|
| 12 | 1 |
0.1%
|
|
| 15 | 18 |
1.6%
|
|
| 19 | 1 |
0.1%
|
|
| 20 | 18 |
1.6%
|
|
| 25 | 3 |
0.3%
|
|
| 30 | 184 |
16.4%
|
|
| 35 | 1 |
0.1%
|
|
| 40 | 3 |
0.3%
|
|
| 45 | 9 |
0.8%
|
|
| 50 | 1 |
0.1%
|
|
| 77 | Don't know | 57 |
5.1%
|
| Sysmiss | 4 |