| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 498 |
90.1%
|
|
| 1 | 9 |
1.6%
|
|
| 2 | 10 |
1.8%
|
|
| 3 | 8 |
1.4%
|
|
| 4 | 4 |
0.7%
|
|
| 5 | 7 |
1.3%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 2 |
0.4%
|
|
| 9 | 3 |
0.5%
|
|
| 10 | 1 |
0.2%
|
|
| 13 | 1 |
0.2%
|
|
| 15 | 1 |
0.2%
|
|
| 16 | 2 |
0.4%
|
|
| 17 | 1 |
0.2%
|
|
| 18 | 1 |
0.2%
|
|
| 30 | 1 |
0.2%
|
|
| 50 | 1 |
0.2%
|
|
| 60 | 1 |
0.2%
|
|
| 107 | 1 |
0.2%
|
|
| Sysmiss | 252 |