Infrastructure and Planning Data Road Mileage, 1990: 5114 Unpaved Road Mileage, 1990: 5% Registered Vehicles, 1990: 275 per mile of paved road Public Transportation Use: 2.0% of commuters Private Vehicle Use: 92% of commuters Private Vehicles - Single Occupant: 83% of commuters Average Travel Time to Work: 22.6 minutes Growth of Population, 1990-2000: 19% Growth of Population 0-24 Years Old: 11% Growth of Population 65 Years and Older: 24% Projected Enrollment Change 1990-2000 Elementary (K-5): 18541 Projected Change 1990-2000 Middle School (6-8): 21688 Projected Change 1990-2000 High School (9-12): 31945 Republican Registration, 1990: 36.39% Democratic Registration, 1990: 55.56% Change in Republican Registration, 1980-1990: 31% Change in Democratic Registration, 1980-1990: 8%