| Value | Category |
|---|---|
| -9 | Don't know |
| -8 | Refused |
| -5 | Not Applicable |
| -3 | Missing |
| 0 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 22 | |
| 23 | |
| 24 | |
| 25 | |
| 26 | |
| 27 | |
| 28 | |
| 30 | |
| 33 | |
| 35 | |
| 36 | |
| 38 | |
| 40 | |
| 41 | |
| 43 | |
| 44 | |
| 45 | |
| 49 | |
| 50 | |
| 51 | |
| 52 | |
| 54 | |
| 55 | |
| 56 | |
| 57 | |
| 58 | |
| 60 | |
| 64 | |
| 70 | |
| 77 | |
| 80 | |
| 87 | |
| 90 | |
| 94 | |
| 100 | |
| 120 | |
| 150 | |
| 171 | |
| 200 | |
| 240 | |
| 300 | |
| 400 | |
| 500 | |
| Sysmiss |