| Value | Category | Cases | |
|---|---|---|---|
| -5 | Missing; Not available | 2 |
0.2%
|
| -2 | No answer | 1 |
0.1%
|
| -1 | Don't know | 657 |
53.4%
|
| 1 | France | 123 |
10%
|
| 2 | China | 134 |
10.9%
|
| 3 | India | 313 |
25.4%
|