Year Years 1950 50.00455 1955 57.85063 1960 62.69 1965 66.8276 1970 70.07591 1975 78.12272 1980 71.38163 1985 69.61173 1990 69.32651 1995 72.64499 2000 77.66136 2005 79.71719 2010 81.09221 2015 81.63116 2020 81.89837 2025 81.63242 2030 81.17785 2035 80.31882 2040 79.64993 2045 79.31562 2050 79.59419 2055 80.59706 2060 81.82368 2065 83.11334 2070 84.4734 2075 85.78981 2080 86.97762 2085 87.99268 2090 88.76792 2095 89.38615 2100 89.8772