| Value | Category | Cases | |
|---|---|---|---|
| -5 | Missing; Not available | 35 |
2.3%
|
| -2 | No answer | 384 |
25.3%
|
| -1 | Don't know | 499 |
32.8%
|
| 1 | France | 77 |
5.1%
|
| 2 | China | 210 |
13.8%
|
| 3 | India | 315 |
20.7%
|