| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 34 |
5.3%
|
| -4 | Too many to count | 518 |
80.3%
|
| 0 | 15 |
2.3%
|
|
| 1 | 5 |
0.8%
|
|
| 2 | 5 |
0.8%
|
|
| 3 | 6 |
0.9%
|
|
| 4 | 6 |
0.9%
|
|
| 5 | 13 |
2%
|
|
| 6 | 5 |
0.8%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 3 |
0.5%
|
|
| 9 | 1 |
0.2%
|
|
| 10 | 10 |
1.6%
|
|
| 12 | 3 |
0.5%
|
|
| 15 | 7 |
1.1%
|
|
| 17 | 1 |
0.2%
|
|
| 20 | 2 |
0.3%
|
|
| 21 | 1 |
0.2%
|
|
| 23 | 1 |
0.2%
|
|
| 25 | 1 |
0.2%
|
|
| 30 | 2 |
0.3%
|
|
| 40 | 1 |
0.2%
|
|
| 50 | 1 |
0.2%
|
|
| 70 | 1 |
0.2%
|
|
| 300 | 2 |
0.3%
|
|
| Sysmiss | 928 |