| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than a year | 67 |
16.5%
|
| 2 | More than or equal to 1 year, but less than 2 years | 99 |
24.4%
|
| 3 | More than or equal to 2 years but less than 5 years | 167 |
41.2%
|
| 4 | More than or equal to 5 years | 72 |
17.8%
|
| Sysmiss | 5631 |