Infrastructure and Planning Data Road Mileage, 1990: 3122 Unpaved Road Mileage, 1990: 12% Registered Vehicles, 1990: 315 per mile of paved road Public Transportation Use: 2.1% of commuters Private Vehicle Use: 88% of commuters Private Vehicles - Single Occupant: 77% of commuters Average Travel Time to Work: 20.4 minutes Growth of Population, 1990-2000: 25% Growth of Population 0-24 Years Old: 16% Growth of Population 65 Years and Older: 57% Projected Enrollment Change 1990-2000 Elementary (K-5): 13991 Projected Change 1990-2000 Middle School (6-8): 13422 Projected Change 1990-2000 High School (9-12): 18527 Republican Registration, 1990: 48.05% Democratic Registration, 1990: 45.21% Change in Republican Registration, 1980-1990: 65% Change in Democratic Registration, 1980-1990: -2%