0 0.8158 5 0.80635 10 0.78955 15 0.76438 20 0.73044 25 0.68958 30 0.64838 35 0.61881 40 0.6125 45 0.63125 50 0.66594 55 0.70495 60 0.74059 65 0.76967 70 0.7916 75 0.80677 80 0.81572 85 0.81875