| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 155 |
12.2%
|
| 1 | 1 year | 121 |
9.6%
|
| 2 | 2 years | 245 |
19.4%
|
| 3 | 3 years | 224 |
17.7%
|
| 4 | 4 years | 109 |
8.6%
|
| 5 | 5 years | 134 |
10.6%
|
| 6 | 6+ years | 129 |
10.2%
|
| 7 | non-numeric | 108 |
8.5%
|
| 8 | don't know | 41 |
3.2%
|
| Sysmiss | 2723 |