Year Number
1950 84.69
1951 85.4
1952 86.035
1953 86.606
1954 87.125
1955 87.599
1956 88.35
1957 88.981
1958 89.514
1959 89.98
1960 90.39
1961 91.053
1962 91.583
1963 91.99
1964 92.263
1965 92.387
1966 92.638
1967 92.681
1968 92.537
1969 92.237
1970 91.793
1971 91.354
1972 90.78
1973 90.064
1974 89.18
1975 88.124
1976 87.166
1977 85.995
1978 84.686
1979 83.324
1980 81.951
1981 80.563
1982 79.192
1983 77.823
1984 76.429
1985 75.014
1986 73.649
1987 72.298
1988 70.973
1989 69.683
1990 68.438
1991 67.314
1992 66.168
1993 65.052
1994 64.038
1995 63.161
1996 62.334
1997 61.684
1998 61.134
1999 60.565
2000 59.923
2001 59.46
2002 58.824
2003 58.117
2004 57.485
2005 56.989
2006 56.447
2007 56.093
2008 55.835
2009 55.536
2010 55.147
2011 54.869
2012 54.479
2013 54.041
2014 53.656
2015 53.367
2016 53.163
2017 53.014
2018 52.91
2019 52.825
2020 52.747
2021 52.685
2022 52.646
2023 52.624
2024 52.612
2025 52.613
2026 52.669
2027 52.728
2028 52.8
2029 52.902
2030 53.044
2031 53.217
2032 53.42
2033 53.656
2034 53.924
2035 54.225
2036 54.522
2037 54.846
2038 55.193
2039 55.553
2040 55.922
2041 56.25
2042 56.582
2043 56.92
2044 57.267
2045 57.623
2046 57.918
2047 58.218
2048 58.529
2049 58.858
2050 59.21
2051 59.5
2052 59.814
2053 60.15
2054 60.499
2055 60.859
2056 61.126
2057 61.404
2058 61.707
2059 62.056
2060 62.461
2061 62.802
2062 63.203
2063 63.649
2064 64.111
2065 64.569
2066 64.891
2067 65.22
2068 65.566
2069 65.945
2070 66.372
2071 66.693
2072 67.064
2073 67.485
2074 67.952
2075 68.462
2076 68.848
2077 69.285
2078 69.769
2079 70.292
2080 70.843
2081 71.234
2082 71.663
2083 72.126
2084 72.623
2085 73.157
2086 73.515
2087 73.912
2088 74.357
2089 74.848
2090 75.373
2091 75.696
2092 76.073
2093 76.492
2094 76.944
2095 77.433
2096 77.728
2097 78.062
2098 78.439
2099 78.868
2100 79.348