Year Number
1950 97.94
1951 99.059
1952 99.897
1953 100.614
1954 101.22
1955 101.622
1956 101.884
1957 102.147
1958 102.275
1959 102.19
1960 101.875
1961 101.69
1962 100.884
1963 99.647
1964 98.129
1965 96.331
1966 94.621
1967 92.667
1968 90.461
1969 87.979
1970 85.264
1971 83.309
1972 81.14
1973 78.841
1974 76.533
1975 74.316
1976 73.879
1977 73.4
1978 72.876
1979 72.357
1980 71.899
1981 71.657
1982 71.472
1983 71.512
1984 71.731
1985 71.898
1986 71.858
1987 71.698
1988 71.4
1989 71.002
1990 70.564
1991 69.782
1992 68.99
1993 68.068
1994 66.907
1995 65.533
1996 65.22
1997 64.582
1998 63.814
1999 63.118
2000 62.499
2001 60.072
2002 58.052
2003 56.27
2004 54.579
2005 53.005
2006 52.939
2007 52.652
2008 52.193
2009 51.656
2010 51.124
2011 51.513
2012 51.848
2013 52.177
2014 52.517
2015 52.848
2016 53.054
2017 53.288
2018 53.496
2019 53.618
2020 53.642
2021 53.678
2022 53.634
2023 53.519
2024 53.375
2025 53.237
2026 53.231
2027 53.222
2028 53.199
2029 53.145
2030 53.053
2031 53.046
2032 53.011
2033 52.952
2034 52.871
2035 52.768
2036 52.755
2037 52.72
2038 52.682
2039 52.669
2040 52.701
2041 52.869
2042 53.073
2043 53.304
2044 53.558
2045 53.836
2046 54.246
2047 54.684
2048 55.106
2049 55.461
2050 55.718
2051 55.974
2052 56.132
2053 56.224
2054 56.303
2055 56.399
2056 56.587
2057 56.8
2058 57.003
2059 57.15
2060 57.219
2061 57.286
2062 57.303
2063 57.285
2064 57.267
2065 57.274
2066 57.359
2067 57.464
2068 57.617
2069 57.856
2070 58.208
2071 58.715
2072 59.342
2073 60.053
2074 60.796
2075 61.53
2076 62.298
2077 63.081
2078 63.849
2079 64.583
2080 65.274
2081 65.934
2082 66.552
2083 67.137
2084 67.697
2085 68.232
2086 68.701
2087 69.169
2088 69.623
2089 70.066
2090 70.514
2091 70.9
2092 71.302
2093 71.725
2094 72.175
2095 72.655
2096 73.061
2097 73.512
2098 74.001
2099 74.514
2100 75.043