| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 4 |
1.2%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 13 |
4%
|
|
| 2 | 1 |
0.3%
|
|
| 10 | 9 |
2.7%
|
|
| 12 | 1 |
0.3%
|
|
| 15 | 4 |
1.2%
|
|
| 20 | 8 |
2.4%
|
|
| 21 | 1 |
0.3%
|
|
| 30 | 36 |
11%
|
|
| 40 | 35 |
10.7%
|
|
| 43 | 1 |
0.3%
|
|
| 50 | 53 |
16.2%
|
|
| 60 | 45 |
13.7%
|
|
| 65 | 3 |
0.9%
|
|
| 70 | 32 |
9.8%
|
|
| 72 | 1 |
0.3%
|
|
| 75 | 11 |
3.4%
|
|
| 80 | 27 |
8.2%
|
|
| 85 | 11 |
3.4%
|
|
| 90 | 18 |
5.5%
|
|
| 95 | 1 |
0.3%
|
|
| 100 | 13 |
4%
|
|
| Sysmiss | 768 |