| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 7 |
0.2%
|
| 2 | 1-4 years | 38 |
1.1%
|
| 3 | 5-9 years | 362 |
10%
|
| 4 | 10-19 years | 1029 |
28.5%
|
| 5 | 20 years or more | 2169 |
60.1%
|
| Sysmiss | 2 |