| Value | Category | Cases | |
|---|---|---|---|
| -5 | Missing; Not available | 3 |
0.3%
|
| -2 | No answer | 5 |
0.4%
|
| -1 | Don't know | 195 |
16.3%
|
| 1 | France | 64 |
5.4%
|
| 2 | China | 97 |
8.1%
|
| 3 | India | 832 |
69.6%
|