| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 111 |
30.5%
|
| 1 | 1 year | 73 |
20.1%
|
| 2 | 2 years | 64 |
17.6%
|
| 3 | 3 years | 23 |
6.3%
|
| 4 | 4 years | 8 |
2.2%
|
| 5 | 5 years | 16 |
4.4%
|
| 6 | 6+ years | 8 |
2.2%
|
| 7 | non-numeric | 3 |
0.8%
|
| 8 | don't know | 58 |
15.9%
|
| Sysmiss | 441 |