| Value | Category | Cases | |
|---|---|---|---|
| 1 | < 2 years | 21562 |
48.3%
|
| 2 | 2 years | 12527 |
28%
|
| 3 | 3 years | 4915 |
11%
|
| 4 | 4+ years | 5656 |
12.7%
|
| Sysmiss | 11163 |