| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Not at all free | 5 |
0.4%
|
| 2 | Not very free | 11 |
0.9%
|
| 3 | Somewhat free | 47 |
3.9%
|
| 4 | Completely free | 1124 |
93.7%
|
| 9 | Don't know | 13 |
1.1%
|
| 998 | Refused | 0 |
0%
|