Some Kentucky drivers are finding the value of their sport utility vehicles, crossovers and light trucks has risen even as the vehicles age. That means paying a higher tax to renew their vehicle registrations. The state bases its motor vehicle property values on the National Automobile Dealers Association clean trade-in value. An official of the association said that the increase of the opposite of usual depreciation came because of supply and demand and hasn’t occurred in the last decade. NADA says among factors driving up light truck values are gasoline prices stabilizing early last year, strong wholesale demand, renewed customer interest, a decrease in production and the Cash for Clunkers program.