| Value | Category |
|---|---|
| -9 | Don't know |
| -8 | Refusal |
| -7 | Does not apply |
| -3 | |
| 0 | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 18 | |
| 20 | |
| 21 | |
| 22 | |
| 23 | |
| 25 | |
| 27 | |
| 29 | |
| 30 | |
| 33 | |
| 35 | |
| 36 | |
| 37 | |
| 38 | |
| 40 | |
| 44 | |
| 45 | |
| 50 | |
| 55 | |
| 57 | |
| 60 | |
| 62 | |
| 66 | |
| 70 | |
| 75 | |
| 84 | |
| 85 | |
| 90 | |
| 92 | |
| 95 | |
| 100 | |
| 134 | |
| 135 | |
| 144 | |
| 175 | |
| 180 | |
| 200 | |
| 215 | |
| 230 | |
| 268 | |
| 270 | |
| 295 | |
| 400 | |
| 433 | |
| 450 | |
| 500 | |
| 501 | |
| 660 | |
| 760 | |
| 800 | |
| 955 | |
| 1000 | |
| 1735 | |
| Sysmiss |