| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 33 |
26.4%
|
| 2 | 25 |
20%
|
|
| 3 | 27 |
21.6%
|
|
| 4 | 16 |
12.8%
|
|
| 5 | 12 |
9.6%
|
|
| 6 | 8 |
6.4%
|
|
| 7 | 2 |
1.6%
|
|
| 8 | 1 |
0.8%
|
|
| 9 | 1 |
0.8%
|
|
| Sysmiss | 888 |