| Value | Category | Cases | |
|---|---|---|---|
| 1 | year | 32 |
33.3%
|
| 2 | 2-5 year | 28 |
29.2%
|
| 3 | 6 year and over | 36 |
37.5%
|
| Sysmiss | don't know | 0 | |
| Sysmiss | refusal | 0 | |
| Sysmiss | .x. censored | 0 | |
| Sysmiss | 60 |