| Value | Category | Cases | |
|---|---|---|---|
| -5 | Missing; Not available | 3 |
0.3%
|
| -2 | No answer | 5 |
0.4%
|
| -1 | Don't know | 354 |
29.5%
|
| 1 | France | 121 |
10.1%
|
| 2 | China | 308 |
25.7%
|
| 3 | India | 409 |
34.1%
|