| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 1 | Not at all free | 11 |
0.9%
|
| 2 | Not very free | 38 |
3.2%
|
| 3 | Somewhat free | 117 |
9.8%
|
| 4 | Completely free | 1011 |
84.3%
|
| 9 | Don't know | 22 |
1.8%
|