| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than one year | 18 |
12.3%
|
| 2 | 1-2 years | 50 |
34.2%
|
| 3 | 3-5 years | 40 |
27.4%
|
| 4 | More than 5 years | 35 |
24%
|
| 99 | No answer | 0 |
0%
|
| 888 | Don't know | 3 |
2.1%
|
| 999 | Not applicable | 0 |
0%
|
| Sysmiss | 1053 |