| Value | Category | Cases | |
|---|---|---|---|
| -5 | Missing; Not available | 45 |
3.7%
|
| -2 | No answer | 10 |
0.8%
|
| -1 | Don't know | 310 |
25.7%
|
| 1 | France | 68 |
5.6%
|
| 2 | China | 199 |
16.5%
|
| 3 | India | 576 |
47.7%
|