| Value | Category | 
|---|---|
| -9 | Don't Know | 
| -8 | Refused | 
| -5 | Not Applicable | 
| -3 | Missing | 
| 0 | |
| 3 | |
| 5 | |
| 9 | |
| 15 | |
| 20 | |
| 28 | |
| 30 | |
| 38 | |
| 40 | |
| 49 | |
| 50 | |
| 60 | |
| 67 | |
| 70 | |
| 80 | |
| 85 | |
| 95 | |
| 99 | |
| 100 | |
| 110 | |
| 120 | |
| 125 | |
| 139 | |
| 140 | |
| 150 | |
| 169 | |
| 170 | |
| 180 | |
| 189 | |
| 199 | |
| 200 | |
| 214 | |
| 224 | |
| 229 | |
| 250 | |
| 280 | |
| 300 | |
| 340 | |
| 350 | |
| 380 | |
| 399 | |
| 400 | |
| 408 | |
| 410 | |
| 420 | |
| 450 | |
| 500 | |
| 600 | |
| 650 | |
| 700 | |
| 750 | |
| 1000 | |
| 1100 | |
| 2000 | |
| Sysmiss |