| Value | Category | Cases | |
|---|---|---|---|
| 1 | Two years or less | 2801 |
24.9%
|
| 2 | Three to five years | 2076 |
18.4%
|
| 3 | More than five years | 5936 |
52.7%
|
| 4 | Don’t know | 450 |
4%
|
| Sysmiss | 6289 |