| Value | Category | Cases | |
|---|---|---|---|
| 1 | Two years or less | 2567 |
26.5%
|
| 2 | Three to five years | 1548 |
16%
|
| 3 | More than five years | 5268 |
54.4%
|
| 4 | Don’t know | 309 |
3.2%
|
| Sysmiss | 5636 |