1971 47.35 53.14 46.61 65.83 56.93 52.88 43.95 53.98 41.54 57.75 43.24 51.47 66.39 74.48 59.63 49.02 1972 48.54 56.52 49.28 68.81 59.45 55.16 46.50 55.56 45.02 59.16 45.48 55.66 67.82 77.05 61.80 51.68 1973 51.72 59.49 53.08 71.26 62.68 57.82 49.18 59.20 48.57 62.00 47.35 60.00 70.46 79.49 66.32 54.66 1974 52.75 62.04 55.41 70.28 64.63 58.00 52.29 61.97 47.98 64.38 49.81 63.37 73.51 80.43 65.20 54.34 1975 53.88 60.99 56.86 69.07 64.45 57.27 52.77 60.64 49.23 64.55 51.88 63.71 75.13 75.03 64.76 54.14 1976 56.24 64.51 60.36 73.51 67.18 60.08 55.97 64.59 51.58 67.44 55.42 65.82 76.01 74.40 66.58 57.16 1977 56.77 66.33 62.54 74.33 69.35 61.90 60.96 66.45 54.31 69.42 57.40 67.69 74.51 76.15 68.15 59.81 1978 58.83 69.30 65.40 75.70 71.67 63.79 65.21 68.93 57.08 71.25 60.08 68.68 75.50 76.61 70.47 63.11 1979 61.40 71.09 67.93 78.07 73.99 66.51 68.77 72.84 60.04 71.16 62.73 68.70 78.73 78.48 72.40 65.11 1980 62.72 72.59 68.94 77.62 75.20 67.16 73.59 75.41 62.22 73.46 65.84 69.60 80.27 81.94 70.83 64.97 1981 64.95 72.52 71.47 76.03 76.08 67.25 76.79 75.77 64.45 72.33 66.48 69.48 80.30 83.23 69.93 66.56 1982 65.42 73.90 69.18 78.11 78.02 66.55 78.32 76.12 66.49 71.54 66.59 70.56 81.19 82.03 71.18 65.21 1983 65.10 75.97 71.36 79.47 78.56 67.71 76.69 77.06 68.28 72.83 68.95 72.13 82.66 82.45 73.85 68.03 1984 69.61 76.23 75.87 82.26 79.59 69.62 79.81 79.18 71.20 74.92 73.00 73.19 85.95 84.94 75.66 72.98 1985 73.33 77.94 79.48 85.18 81.09 71.21 82.44 81.54 74.74 77.36 76.81 75.10 87.86 87.85 78.52 75.79 1986 74.85 79.76 82.12 88.60 83.13 72.86 87.72 83.60 76.71 79.74 79.56 77.50 89.81 89.28 81.83 78.37 1987 78.42 81.10 85.62 88.63 85.00 73.86 95.22 86.09 79.86 80.86 81.17 81.87 92.37 89.93 85.45 81.04 1988 81.81 83.67 89.80 89.71 88.82 76.52 95.13 89.49 84.82 82.91 81.08 86.10 94.88 92.73 89.87 84.42 1989 85.47 87.21 91.99 89.84 92.68 79.33 95.37 92.06 88.82 86.79 81.83 90.18 97.14 96.76 91.76 87.38 1990 87.10 91.18 91.78 90.71 95.04 83.89 97.57 93.88 93.09 90.27 83.44 93.55 98.46 100.38 92.37 88.92