Year Number
1950 95.236
1951 94.372
1952 91.971
1953 89.921
1954 88.631
1955 87.727
1956 86.159
1957 85.636
1958 85.357
1959 84.825
1960 84.07
1961 84.55
1962 84.193
1963 83.623
1964 83.5
1965 84.029
1966 85.52
1967 87.125
1968 88.787
1969 90.318
1970 91.62
1971 93.186
1972 94.331
1973 95.227
1974 96.214
1975 97.564
1976 99.013
1977 99.704
1978 99.519
1979 98.11
1980 95.385
1981 95.042
1982 93.593
1983 91.601
1984 90.136
1985 89.91
1986 89.09
1987 89.628
1988 90.712
1989 91.104
1990 90.174
1991 90.707
1992 89.849
1993 88.142
1994 86.486
1995 85.3
1996 84.118
1997 83.395
1998 82.799
1999 81.782
2000 80.136
2001 78.384
2002 76.271
2003 73.92
2004 71.556
2005 69.305
2006 67.556
2007 65.743
2008 63.985
2009 62.414
2010 61.095
2011 60.333
2012 59.799
2013 59.41
2014 59.018
2015 58.534
2016 58.066
2017 57.468
2018 56.804
2019 56.174
2020 55.624
2021 55.119
2022 54.677
2023 54.266
2024 53.838
2025 53.375
2026 53.016
2027 52.605
2028 52.156
2029 51.694
2030 51.233
2031 50.838
2032 50.434
2033 50.024
2034 49.606
2035 49.184
2036 48.823
2037 48.453
2038 48.1
2039 47.8
2040 47.572
2041 47.492
2042 47.474
2043 47.486
2044 47.481
2045 47.438
2046 47.441
2047 47.386
2048 47.337
2049 47.38
2050 47.559
2051 47.915
2052 48.366
2053 48.869
2054 49.357
2055 49.791
2056 50.24
2057 50.627
2058 50.951
2059 51.21
2060 51.404
2061 51.591
2062 51.696
2063 51.742
2064 51.765
2065 51.787
2066 51.88
2067 51.956
2068 52.021
2069 52.078
2070 52.129
2071 52.27
2072 52.396
2073 52.515
2074 52.642
2075 52.79
2076 53.091
2077 53.392
2078 53.695
2079 53.993
2080 54.28
2081 54.683
2082 55.063
2083 55.425
2084 55.771
2085 56.103
2086 56.544
2087 56.96
2088 57.351
2089 57.714
2090 58.048
2091 58.458
2092 58.829
2093 59.163
2094 59.461
2095 59.724
2096 60.041
2097 60.318
2098 60.563
2099 60.782
2100 60.977