| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | less than one year | 306 | 311 |
7.8%
|
| 2 | 1-3 years | 550 | 558 |
14%
|
| 3 | more than 3 years | 426 | 427 |
10.7%
|
| 4 | DK | 7 | 7 |
0.2%
|
| Sysmiss | 2683 | 2669 |