| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
2.4%
|
| 1 | One month or less | 4 |
2%
|
| 2 | 27 |
13.2%
|
|
| 3 | 115 |
56.1%
|
|
| 4 | 25 |
12.2%
|
|
| 5 | 8 |
3.9%
|
|
| 6 | 8 |
3.9%
|
|
| 7 | 4 |
2%
|
|
| 8 | 1 |
0.5%
|
|
| 9 | 4 |
2%
|
|
| 10 | 1 |
0.5%
|
|
| 11 | 1 |
0.5%
|
|
| 12 | 2 |
1%
|
|
| Sysmiss | 156 |