| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 10 |
10.4%
|
| 1 | 1 year | 6 |
6.3%
|
| 2 | 2 years | 1 |
1%
|
| 3 | 3 years | 9 |
9.4%
|
| 4 | 4 years | 6 |
6.3%
|
| 5 | 5 years | 9 |
9.4%
|
| 6 | 6+ years | 6 |
6.3%
|
| 7 | non-numeric | 33 |
34.4%
|
| 8 | don't know | 16 |
16.7%
|
| Sysmiss | 116 |