| Value | Category |
|---|---|
| 0 | none |
| 1 | approx -ten percent |
| 2 | approx-twenty percent |
| 3 | approx-thirty percent |
| 4 | approx-fouty percent |
| 5 | approx-fifty percent |
| 6 | approx-sixty percent |
| 7 | approx- seventy percent |
| 8 | approx-eighty percent |
| 9 | approx-ninety percent |
| 10 | almost all |
| 99 | diont know |