| Value | Category | Cases | |
|---|---|---|---|
| -4 | Not asked | 0 |
0%
|
| -2 | NA | 0 |
0%
|
| -1 | DK | 0 |
0%
|
| 1 | Have done | 115 |
10.1%
|
| 2 | Have not | 1028 |
89.9%
|