16 1.101 16.5 1.088 17 1.074 17.5 1.061 18 1.048 18.5 1.036 19 1.024 19.5 1.012 20 1 20.5 0.989 21 0.978 21.5 0.967 22 0.965 22.5 0.946 23 0.936 23.5 0.926 24 0.916 24.5 0.906 25 0.897 25.5 0.888