Year Number
1950 89.03
1951 88.667
1952 87.317
1953 85.702
1954 84.133
1955 82.601
1956 82.055
1957 81.643
1958 81.139
1959 80.368
1960 79.323
1961 80.066
1962 80.087
1963 79.752
1964 79.529
1965 79.608
1966 80.926
1967 82.302
1968 83.619
1969 84.617
1970 85.179
1971 86.677
1972 87.515
1973 87.881
1974 88.024
1975 88.069
1976 88.791
1977 89.273
1978 89.509
1979 89.459
1980 89.153
1981 89.538
1982 89.471
1983 89.104
1984 88.586
1985 87.945
1986 88.299
1987 88.728
1988 89.082
1989 89.1
1990 88.585
1991 89.367
1992 89.586
1993 89.409
1994 89.331
1995 89.91
1996 90.46
1997 90.925
1998 91.429
1999 91.793
2000 91.816
2001 92.162
2002 92.049
2003 91.588
2004 90.992
2005 90.422
2006 90.104
2007 89.687
2008 89.168
2009 88.505
2010 87.7
2011 87.2
2012 86.502
2013 85.663
2014 84.72
2015 83.656
2016 82.968
2017 82.246
2018 81.459
2019 80.59
2020 79.659
2021 79.035
2022 78.311
2023 77.518
2024 76.687
2025 75.83
2026 75.173
2027 74.462
2028 73.701
2029 72.892
2030 72.043
2031 71.357
2032 70.607
2033 69.806
2034 68.971
2035 68.112
2036 67.398
2037 66.641
2038 65.856
2039 65.058
2040 64.259
2041 63.607
2042 62.933
2043 62.246
2044 61.556
2045 60.87
2046 60.314
2047 59.743
2048 59.17
2049 58.61
2050 58.071
2051 57.671
2052 57.265
2053 56.858
2054 56.454
2055 56.056
2056 55.766
2057 55.458
2058 55.141
2059 54.82
2060 54.501
2061 54.274
2062 54.032
2063 53.776
2064 53.506
2065 53.226
2066 53.026
2067 52.8
2068 52.559
2069 52.315
2070 52.078
2071 51.93
2072 51.769
2073 51.6
2074 51.427
2075 51.256
2076 51.17
2077 51.066
2078 50.951
2079 50.836
2080 50.724
2081 50.702
2082 50.665
2083 50.617
2084 50.562
2085 50.504
2086 50.53
2087 50.535
2088 50.524
2089 50.501
2090 50.469
2091 50.524
2092 50.55
2093 50.556
2094 50.549
2095 50.536
2096 50.603
2097 50.648
2098 50.68
2099 50.703
2100 50.721