Year Number
1950 80.04
1951 81.063
1952 81.574
1953 82.322
1954 83.524
1955 85.151
1956 87.223
1957 89.748
1958 92.313
1959 94.429
1960 95.942
1961 97.842
1962 99.008
1963 99.505
1964 99.543
1965 99.207
1966 98.998
1967 98.273
1968 97.075
1969 95.435
1970 93.428
1971 91.194
1972 88.842
1973 86.426
1974 84.015
1975 81.722
1976 79.659
1977 78.087
1978 76.873
1979 75.803
1980 74.74
1981 75.311
1982 75.228
1983 74.779
1984 74.569
1985 74.947
1986 74.666
1987 75.244
1988 76.295
1989 77.197
1990 77.648
1991 79.083
1992 80.002
1993 80.394
1994 80.477
1995 80.446
1996 80.079
1997 79.685
1998 79.051
1999 77.919
2000 76.316
2001 75.389
2002 73.458
2003 71.065
2004 69.088
2005 67.969
2006 66.01
2007 65.74
2008 66.225
2009 66.31
2010 65.575
2011 65.872
2012 65.098
2013 63.845
2014 63.029
2015 63
2016 62.912
2017 63.621
2018 64.731
2019 65.597
2020 65.891
2021 66.008
2022 65.66
2023 65.005
2024 64.323
2025 63.777
2026 63.34
2027 62.927
2028 62.54
2029 62.135
2030 61.704
2031 61.279
2032 60.864
2033 60.423
2034 59.92
2035 59.347
2036 58.747
2037 58.123
2038 57.508
2039 56.953
2040 56.485
2041 56.2
2042 55.969
2043 55.801
2044 55.707
2045 55.681
2046 55.798
2047 55.938
2048 56.102
2049 56.295
2050 56.509
2051 56.77
2052 57.044
2053 57.284
2054 57.433
2055 57.458
2056 57.425
2057 57.262
2058 57.023
2059 56.772
2060 56.556
2061 56.402
2062 56.285
2063 56.145
2064 55.904
2065 55.523
2066 55.075
2067 54.511
2068 53.931
2069 53.463
2070 53.176
2071 53.113
2072 53.194
2073 53.376
2074 53.601
2075 53.821
2076 54.115
2077 54.399
2078 54.679
2079 54.959
2080 55.237
2081 55.559
2082 55.854
2083 56.122
2084 56.358
2085 56.556
2086 56.744
2087 56.891
2088 56.998
2089 57.061
2090 57.081
2091 57.078
2092 57.037
2093 56.962
2094 56.861
2095 56.746
2096 56.653
2097 56.542
2098 56.433
2099 56.358
2100 56.33