Scotia Industries Ltd$.$ purchased sprayer equipment for $$430,000$ that had an estimated useful life of $10$ years and an estimated residual value of $$30,000.$ If the carrying value of the equipment was $$190,000$ on the company's balance sheet, how many more years of use would the equipment have $($until the end of its estimated useful life$)?$ Assume Scotia Industries Ltd$.$ uses the straight$-$line method of depreciation. If necessary, round your answer to one decimal place.