| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 4 |
0.1%
|
| 2 | no | 2 |
0.1%
|
| 3 | v.r.: no, it is free | 3 |
0.1%
|
| 98 | don't know | 0 |
0%
|
| 99 | refuse to answer | 0 |
0%
|
| Missing value | 3049 |
99.7%
|