| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 99 |
15.5%
|
| 2 | 1 year to 2 years | 89 |
13.9%
|
| 3 | More than 2 years but less than 5 years | 187 |
29.2%
|
| 4 | More than 5 years | 226 |
35.3%
|
| 99 | Don?t know | 39 |
6.1%
|
| Sysmiss | 13354 |