A classic car was for sale with a current asking price of $$45,000.$ If a return of $8\mathrm{.}5\%,$ compounded annually,

was earned and the manufacturer's recommended price when it was originally sold, was $$5,000,$ then how

many years have elapsed since it was originally built?

Round your answer to $2$ decimal places and do not enter any symbols such as $$,\%$ or commas.

Answer: