Year Years 1950 98.90318 1955 97.76316 1960 97.38025 1965 97.36282 1970 97.30608 1975 97.40979 1980 97.69777 1985 98.11306 1990 98.51981 1995 99.01908 2000 99.67228 2005 100.50291 2010 100.94672 2015 101.49536 2020 101.80649 2025 101.96935 2030 101.92264 2035 101.75237 2040 101.54942 2045 101.40351 2050 101.2873 2055 101.22696 2060 101.24542 2065 101.28181 2070 101.32939 2075 101.38355 2080 101.42001 2085 101.45046 2090 101.47531 2095 101.50316 2100 101.54751