Year Years 1950 109.12964 1955 103.29898 1960 99.4823 1965 96.61271 1970 95.34465 1975 94.72365 1980 93.58032 1985 92.07007 1990 91.63073 1995 91.68085 2000 91.67269 2005 90.83786 2010 90.7155 2015 91.08435 2020 91.74314 2025 92.42481 2030 92.94088 2035 93.35107 2040 93.71629 2045 93.97275 2050 94.05797 2055 93.87414 2060 93.49077 2065 92.95039 2070 92.22063 2075 91.50288 2080 90.74939 2085 89.99796 2090 89.29636 2095 88.72072 2100 88.3163