| Value | Category | Cases | |
|---|---|---|---|
| -9 | missing | 0 |
0%
|
| -8 | dont know | 0 |
0%
|
| -7 | na | 0 |
0%
|
| 1 | 0-1 mo | 12 |
6.7%
|
| 2 | 1-6 mo. | 33 |
18.5%
|
| 3 | 7-12 mo. | 23 |
12.9%
|
| 4 | over 1 yr | 110 |
61.8%
|
| Sysmiss | 435 |