| Value | Category | Cases | |
|---|---|---|---|
| 1 | Two years or less | 2440 |
22.5%
|
| 2 | Three to five years | 2329 |
21.5%
|
| 3 | More than five years | 5656 |
52.2%
|
| 4 | Don’t know | 415 |
3.8%
|
| Sysmiss | 5485 |