| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Not at all free | 4 |
0.3%
|
| 2 | Not very free | 17 |
1.4%
|
| 3 | Somewhat free | 159 |
13.3%
|
| 4 | Completely free | 1017 |
84.8%
|
| 9 | Don't know | 3 |
0.3%
|
| 98 | Refused | 0 |
0%
|