| Value | Category |
|---|---|
| -5 | other |
| -4 | missing data |
| -3 | refused to answer |
| -2 | not applicable |
| -1 | do not know |
| 0 | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 10 | |
| 15 | |
| 20 | |
| 25 | |
| 30 | |
| 40 | |
| 45 | |
| 56 | |
| 60 | |
| 65 | |
| 67 | |
| 70 | |
| 80 | |
| 90 | |
| 95 | |
| 108 | |
| 116 | |
| 120 | |
| 121 | |
| 124 | |
| 140 | |
| 150 | |
| 160 | |
| 180 | |
| 190 | |
| 200 | |
| 210 | |
| 240 | |
| 250 | |
| 260 | |
| 270 | |
| 280 | |
| 300 | |
| 320 | |
| 340 | |
| 360 | |
| 380 | |
| 400 | |
| 420 | |
| 460 | |
| 480 | |
| 500 | |
| 540 | |
| 600 | |
| 660 | |
| 720 |