Year Number
1950 51.08
1951 52.148
1952 52.976
1953 53.865
1954 54.856
1955 55.849
1956 56.411
1957 57.198
1958 57.952
1959 58.456
1960 58.648
1961 58.92
1962 58.784
1963 58.423
1964 58.139
1965 58.087
1966 58.184
1967 58.509
1968 58.97
1969 59.377
1970 59.626
1971 59.989
1972 60.114
1973 60.081
1974 60.002
1975 59.912
1976 59.748
1977 59.542
1978 59.268
1979 58.893
1980 58.416
1981 57.796
1982 57.184
1983 56.573
1984 55.977
1985 55.431
1986 55.164
1987 54.896
1988 54.661
1989 54.495
1990 54.404
1991 54.486
1992 54.589
1993 54.711
1994 54.815
1995 54.865
1996 54.893
1997 54.853
1998 54.742
1999 54.55
2000 54.268
2001 53.95
2002 53.56
2003 53.126
2004 52.707
2005 52.357
2006 51.889
2007 51.53
2008 51.282
2009 51.137
2010 51.091
2011 51.057
2012 51.131
2013 51.377
2014 51.77
2015 52.21
2016 52.772
2017 53.328
2018 53.873
2019 54.4
2020 54.915
2021 55.576
2022 56.207
2023 56.818
2024 57.43
2025 58.051
2026 58.582
2027 59.131
2028 59.704
2029 60.305
2030 60.944
2031 61.54
2032 62.168
2033 62.811
2034 63.456
2035 64.093
2036 64.591
2037 65.085
2038 65.569
2039 65.995
2040 66.322
2041 66.443
2042 66.515
2043 66.551
2044 66.602
2045 66.726
2046 66.841
2047 67.028
2048 67.301
2049 67.65
2050 68.048
2051 68.334
2052 68.693
2053 69.105
2054 69.554
2055 70.04
2056 70.412
2057 70.831
2058 71.281
2059 71.726
2060 72.129
2061 72.31
2062 72.489
2063 72.655
2064 72.794
2065 72.907
2066 72.84
2067 72.787
2068 72.755
2069 72.769
2070 72.858
2071 72.831
2072 72.89
2073 73.036
2074 73.251
2075 73.507
2076 73.556
2077 73.671
2078 73.85
2079 74.095
2080 74.411
2081 74.558
2082 74.796
2083 75.115
2084 75.493
2085 75.909
2086 76.112
2087 76.381
2088 76.702
2089 77.062
2090 77.462
2091 77.641
2092 77.869
2093 78.147
2094 78.475
2095 78.85
2096 78.972
2097 79.147
2098 79.376
2099 79.664
2100 80.009