Infrastructure and Planning Data Road Mileage, 1990: 3906 Unpaved Road Mileage, 1990: 10% Registered Vehicles, 1990: 280 per mile of paved road Public Transportation Use: 1.9% of commuters Private Vehicle Use: 90% of commuters Private Vehicles - Single Occupant: 80% of commuters Average Travel Time to Work: 19.4 minutes Growth of Population, 1990-2000: 15% Growth of Population 0-24 Years Old: 5% Growth of Population 65 Years and Older: 21% Projected Enrollment Change 1990-2000 Elementary (K-5): 7655 Projected Change 1990-2000 Middle School (6-8): 8162 Projected Change 1990-2000 High School (9-12): 5275 Republican Registration, 1990: 48.08% Democratic Registration, 1990: 41.87% Change in Republican Registration, 1980-1990: 15% Change in Democratic Registration, 1980-1990: -8%