Year Number
1950 53.49
1951 53.058
1952 51.913
1953 50.413
1954 49.045
1955 48.153
1956 48.773
1957 49.443
1958 50.334
1959 51.38
1960 52.401
1961 52.644
1962 53.113
1963 53.589
1964 53.762
1965 53.51
1966 53.394
1967 52.788
1968 51.917
1969 51.169
1970 50.737
1971 50.088
1972 49.825
1973 49.826
1974 49.853
1975 49.787
1976 50.114
1977 50.222
1978 50.176
1979 50.077
1980 49.977
1981 49.81
1982 49.666
1983 49.556
1984 49.444
1985 49.313
1986 49.437
1987 49.428
1988 49.351
1989 49.342
1990 49.46
1991 49.708
1992 50.096
1993 50.428
1994 50.401
1995 49.861
1996 49.2
1997 48.04
1998 46.635
1999 45.375
2000 44.481
2001 44.15
2002 44.153
2003 44.31
2004 44.327
2005 44.035
2006 43.768
2007 43.438
2008 43.128
2009 42.855
2010 42.57
2011 42.701
2012 42.547
2013 42.392
2014 42.604
2015 43.336
2016 44.383
2017 46.008
2018 47.892
2019 49.563
2020 50.756
2021 51.839
2022 52.447
2023 52.696
2024 52.847
2025 53.066
2026 53.578
2027 54.085
2028 54.53
2029 54.778
2030 54.743
2031 54.666
2032 54.381
2033 53.973
2034 53.573
2035 53.279
2036 53.34
2037 53.505
2038 53.752
2039 54.052
2040 54.395
2041 55.056
2042 55.731
2043 56.458
2044 57.272
2045 58.169
2046 59.413
2047 60.704
2048 62.012
2049 63.305
2050 64.564
2051 66.055
2052 67.487
2053 68.781
2054 69.813
2055 70.486
2056 71.036
2057 71.245
2058 71.118
2059 70.692
2060 70.017
2061 69.362
2062 68.49
2063 67.438
2064 66.241
2065 64.928
2066 63.765
2067 62.514
2068 61.284
2069 60.221
2070 59.41
2071 59.154
2072 59.136
2073 59.291
2074 59.514
2075 59.731
2076 60.263
2077 60.803
2078 61.341
2079 61.857
2080 62.327
2081 63.006
2082 63.642
2083 64.21
2084 64.685
2085 65.054
2086 65.49
2087 65.832
2088 66.073
2089 66.206
2090 66.228
2091 66.233
2092 66.145
2093 65.97
2094 65.729
2095 65.444
2096 65.184
2097 64.878
2098 64.558
2099 64.262
2100 64.015