| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Not at all free | 12 |
0.9%
|
| 2 | Not very free | 49 |
3.6%
|
| 3 | Somewhat free | 369 |
27.3%
|
| 4 | Completely free | 792 |
58.7%
|
| 9 | Don't know | 128 |
9.5%
|
| 998 | Refused | 0 |
0%
|