Year Years 1950 89.48572 1955 89.09523 1960 89.022 1965 89.5335 1970 89.79031 1975 90.48517 1980 91.36408 1985 90.53095 1990 89.19721 1995 88.80069 2000 89.15852 2005 88.46956 2010 87.32845 2015 85.9018 2020 85.04313 2025 84.09332 2030 83.34553 2035 82.77395 2040 82.26825 2045 82.22456 2050 82.77632 2055 83.64441 2060 84.8847 2065 86.25548 2070 87.55793 2075 88.67945 2080 89.59283 2085 90.25885 2090 90.78704 2095 91.32038 2100 91.85821