| Value | Category | Cases | |
|---|---|---|---|
| 0 | 16 |
7%
|
|
| 1 | 1 |
0.4%
|
|
| 2 | 2 |
0.9%
|
|
| 3 | 2 |
0.9%
|
|
| 6 | 1 |
0.4%
|
|
| 9 | 1 |
0.4%
|
|
| 10 | 14 |
6.1%
|
|
| 12 | 1 |
0.4%
|
|
| 15 | 19 |
8.3%
|
|
| 20 | 17 |
7.4%
|
|
| 30 | 105 |
45.7%
|
|
| 31 | 1 |
0.4%
|
|
| 32 | 1 |
0.4%
|
|
| 35 | 1 |
0.4%
|
|
| 40 | 12 |
5.2%
|
|
| 45 | 6 |
2.6%
|
|
| 50 | 3 |
1.3%
|
|
| 77 | Don't know | 9 |
3.9%
|
| 88 | Refused | 16 |
7%
|
| 99 | Missing | 2 |
0.9%
|
| Sysmiss | 5396 |