| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 4 |
0.1%
|
| 2 | 1-4 years | 30 |
0.9%
|
| 3 | 5-9 years | 294 |
9.1%
|
| 4 | 10-19 years | 1025 |
31.8%
|
| 5 | 20 years or more | 1865 |
57.9%
|
| Sysmiss | 2 |