| Thetford - Means of Transportation to Work | FIPS Code=17055 |
| 1970 | 1980 | 1990 | |
| Per Cent of Working Population that Drove Alone to Work | 71.21 | 59.34 | 81.82 |
| Per Cent of Working Population that Carpooled to Work | 12.69 | 30.67 | 7.66 |
| Per Cent of Working Population that Used Public Transportation | 0.00 | 0.70 | 0.23 |
| Per Cent of Working Population that Walked to Work | 12.88 | 2.90 | 3.46 |
| Per Cent of Working Population that Used Other Means to Get to Work | 3.22 | 0.70 | 1.13 |
| Per Cent of Working Population that Worked at Home | 0.00 | 5.69 | 5.71 |