| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 1310 |
27.6%
|
| 1 | 1 year | 665 |
14%
|
| 2 | 2 years | 756 |
16%
|
| 3 | 3 years | 498 |
10.5%
|
| 4 | 4 years | 253 |
5.3%
|
| 5 | 5 years | 581 |
12.3%
|
| 6 | 6+ years | 424 |
8.9%
|
| 7 | non-numeric | 53 |
1.1%
|
| 8 | don't know | 198 |
4.2%
|
| Sysmiss | 8177 |