| Value | Category | 
|---|---|
| -9 | Don't Know | 
| -8 | Refused | 
| -5 | Not Applicable | 
| -3 | Missing | 
| 0 | |
| 5 | |
| 10 | |
| 12 | |
| 15 | |
| 17 | |
| 20 | |
| 25 | |
| 27 | |
| 30 | |
| 32 | |
| 35 | |
| 40 | |
| 41 | |
| 45 | |
| 47 | |
| 48 | |
| 50 | |
| 55 | |
| 56 | |
| 60 | |
| 70 | |
| 80 | |
| 90 | |
| 98 | |
| 100 | |
| 108 | |
| 110 | |
| 120 | |
| 130 | |
| 140 | |
| 145 | |
| 150 | |
| 160 | |
| 170 | |
| 180 | |
| 200 | |
| 216 | |
| 220 | |
| 240 | |
| 250 | |
| 264 | |
| 270 | |
| 300 | |
| 310 | |
| 320 | |
| 350 | |
| 360 | |
| 400 | |
| 437 | |
| 500 | |
| 516 | |
| 600 | |
| 660 | |
| 720 | |
| 800 | |
| 840 | |
| 1000 | |
| 1170 | |
| 1200 | |
| 1350 | |
| 1800 | |
| 2400 | |
| 4200 | |
| Sysmiss |