| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 292 |
17.5%
|
| 1 | 1 year | 197 |
11.8%
|
| 2 | 2 years | 212 |
12.7%
|
| 3 | 3 years | 97 |
5.8%
|
| 4 | 4 years | 64 |
3.8%
|
| 5 | 5 years | 109 |
6.5%
|
| 6 | 6+ years | 179 |
10.7%
|
| 7 | non-numeric | 293 |
17.6%
|
| 8 | don't know | 226 |
13.5%
|
| Sysmiss | 1285 |