| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 0 | 70 |
55.1%
|
|
| 1 | 14 |
11%
|
|
| 2 | 6 |
4.7%
|
|
| 3 | 9 |
7.1%
|
|
| 4 | 3 |
2.4%
|
|
| 5 | 3 |
2.4%
|
|
| 6 | 1 |
0.8%
|
|
| 7 | 3 |
2.4%
|
|
| 10 | 6 |
4.7%
|
|
| 15 | 3 |
2.4%
|
|
| 19 | 1 |
0.8%
|
|
| 20 | 3 |
2.4%
|
|
| 35 | 1 |
0.8%
|
|
| 60 | 1 |
0.8%
|
|
| 80 | 1 |
0.8%
|
|
| 240 | 1 |
0.8%
|
|
| Sysmiss | 473 |