| Variable | mean | N | min | max | sd |
| dr-o | 12.26 | 341.00 | 6.71 | 20.31 | 2.45 |
| dr-c | 24.15 | 341.00 | 9.64 | 44.65 | 7.14 |
| dr-t | 36.40 | 341.00 | 19.27 | 57.58 | 6.96 |
| CPI | 103.12 | 341.00 | 97.65 | 110.09 | 1.99 |
| Income | 17,242.46 | 341.00 | 7217.87 | 48,841.40 | 7597.07 |
| square | 2532.89 | 341.00 | 9.56 | 10,191.52 | 2059.74 |
| hp | 4433.88 | 341.00 | 1325.00 | 18,833.00 | 3030.63 |