| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
2.9%
|
| 0 | 1 |
0.4%
|
|
| 1 | 2 |
0.8%
|
|
| 2 | 17 |
7.1%
|
|
| 3 | 16 |
6.7%
|
|
| 4 | 10 |
4.2%
|
|
| 5 | 24 |
10%
|
|
| 6 | 11 |
4.6%
|
|
| 7 | 6 |
2.5%
|
|
| 8 | 4 |
1.7%
|
|
| 9 | 9 |
3.8%
|
|
| 10 | 26 |
10.8%
|
|
| 11 | 2 |
0.8%
|
|
| 12 | 6 |
2.5%
|
|
| 13 | 3 |
1.3%
|
|
| 14 | 7 |
2.9%
|
|
| 15 | 14 |
5.8%
|
|
| 16 | 2 |
0.8%
|
|
| 17 | 4 |
1.7%
|
|
| 18 | 6 |
2.5%
|
|
| 19 | 4 |
1.7%
|
|
| 20 | 21 |
8.8%
|
|
| 21 | 2 |
0.8%
|
|
| 22 | 1 |
0.4%
|
|
| 23 | 6 |
2.5%
|
|
| 24 | 2 |
0.8%
|
|
| 25 | 2 |
0.8%
|
|
| 26 | 2 |
0.8%
|
|
| 27 | 2 |
0.8%
|
|
| 29 | 1 |
0.4%
|
|
| 30 | 1 |
0.4%
|
|
| 33 | 1 |
0.4%
|
|
| 35 | 1 |
0.4%
|
|
| 40 | 1 |
0.4%
|
|
| 50 | 3 |
1.3%
|
|
| 55 | 2 |
0.8%
|
|
| 56 | 1 |
0.4%
|
|
| 64 | 1 |
0.4%
|
|
| 69 | 1 |
0.4%
|
|
| 80 | 1 |
0.4%
|
|
| 1994 | 1 |
0.4%
|
|
| 2000 | 1 |
0.4%
|
|
| 2005 | 1 |
0.4%
|
|
| 2011 | 1 |
0.4%
|
|
| 2012 | 1 |
0.4%
|
|
| 2013 | 1 |
0.4%
|
|
| 2017 | 1 |
0.4%
|
|
| Sysmiss | 361 |