| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 4 |
13.3%
|
| -8 | Refused | 0 |
0%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 1 |
3.3%
|
| 1 | Less than 1 year | 1 |
3.3%
|
| 2 | 1 |
3.3%
|
|
| 3 | 3 |
10%
|
|
| 4 | 1 |
3.3%
|
|
| 5 | 2 |
6.7%
|
|
| 6 | 1 |
3.3%
|
|
| 7 | 3 |
10%
|
|
| 10 | 3 |
10%
|
|
| 11 | 2 |
6.7%
|
|
| 12 | 1 |
3.3%
|
|
| 13 | 1 |
3.3%
|
|
| 17 | 2 |
6.7%
|
|
| 20 | 1 |
3.3%
|
|
| 28 | 2 |
6.7%
|
|
| 30 | 1 |
3.3%
|
|
| Sysmiss | 1922 |