Infrastructure and Planning Data Road Mileage, 1990: 3241 Unpaved Road Mileage, 1990: 4% Registered Vehicles, 1990: 255 per mile of paved road Public Transportation Use: 1.9% of commuters Private Vehicle Use: 91% of commuters Private Vehicles - Single Occupant: 78% of commuters Average Travel Time to Work: 19.8 minutes Growth of Population, 1990-2000: 36% Growth of Population 0-24 Years Old: 23% Growth of Population 65 Years and Older: 41% Projected Enrollment Change 1990-2000 Elementary (K-5): 21776 Projected Change 1990-2000 Middle School (6-8): 17643 Projected Change 1990-2000 High School (9-12): 20341 Republican Registration, 1990: 41.16% Democratic Registration, 1990: 48.50% Change in Republican Registration, 1980-1990: 66% Change in Democratic Registration, 1980-1990: 31%