Infrastructure and Planning Data Road Mileage, 1990: 6605 Unpaved Road Mileage, 1990: .4% Registered Vehicles, 1990: 266 per mile of paved road Public Transportation Use: 6.5% of commuters Private Vehicle Use: 87% of commuters Private Vehicles - Single Occupant: 78% of commuters Average Travel Time to Work: 23.7 minutes Growth of Population, 1990-2000: 10% Growth of Population 0-24 Years Old: 11% Growth of Population 65 Years and Older: 9% Projected Enrollment Change 1990-2000 Elementary (K-5): 30084 Projected Change 1990-2000 Middle School (6-8): 32554 Projected Change 1990-2000 High School (9-12): 46279 Republican Registration, 1990: 37.43% Democratic Registration, 1990: 54.64% Change in Republican Registration, 1980-1990: 68% Change in Democratic Registration, 1980-1990: -27%