| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 27 |
3.5%
|
| 2 | 1 to 3 years | 98 |
12.9%
|
| 3 | 4 to 10 years | 205 |
26.9%
|
| 4 | 10 to 20 years | 154 |
20.2%
|
| 5 | More than 20 years | 277 |
36.4%
|
| 2147483622 | Don't know | 0 |
0%
|
| 2147483623 | Refused to respond | 0 |
0%
|
| 2147483647 | Not administered | 0 |
0%
|
| 11 | .Z | 5255 | |
| Sysmiss | 76 |