Year Number
1950 102.704
1951 100.353
1952 98.061
1953 95.91
1954 93.788
1955 91.665
1956 92.619
1957 93.395
1958 93.973
1959 94.56
1960 95.4
1961 96.141
1962 96.614
1963 97.008
1964 97.33
1965 97.517
1966 100.185
1967 102.288
1968 103.713
1969 104.332
1970 104.004
1971 102.837
1972 101.317
1973 99.402
1974 97.153
1975 94.661
1976 91.213
1977 88.403
1978 86.084
1979 83.958
1980 81.814
1981 82.157
1982 81.923
1983 81.369
1984 80.851
1985 80.554
1986 79.769
1987 78.898
1988 78.225
1989 77.976
1990 78.167
1991 78.515
1992 79.569
1993 80.761
1994 81.435
1995 81.402
1996 81.501
1997 80.71
1998 79.579
1999 78.823
2000 78.731
2001 77.749
2002 77.689
2003 78.183
2004 78.675
2005 78.848
2006 78.779
2007 78.424
2008 77.805
2009 77.073
2010 76.346
2011 76.204
2012 75.935
2013 75.542
2014 75.005
2015 74.329
2016 72.934
2017 71.487
2018 70.035
2019 68.652
2020 67.396
2021 66.353
2022 65.504
2023 64.761
2024 64.051
2025 63.367
2026 62.889
2027 62.423
2028 62.012
2029 61.743
2030 61.637
2031 61.713
2032 61.905
2033 62.2
2034 62.559
2035 62.943
2036 63.373
2037 63.828
2038 64.247
2039 64.558
2040 64.713
2041 64.715
2042 64.576
2043 64.307
2044 63.942
2045 63.508
2046 62.998
2047 62.454
2048 61.854
2049 61.151
2050 60.336
2051 59.415
2052 58.451
2053 57.503
2054 56.674
2055 56.033
2056 55.598
2057 55.351
2058 55.257
2059 55.286
2060 55.398
2061 55.624
2062 55.925
2063 56.319
2064 56.797
2065 57.362
2066 57.971
2067 58.65
2068 59.374
2069 60.112
2070 60.845
2071 61.509
2072 62.167
2073 62.788
2074 63.345
2075 63.811
2076 64.092
2077 64.309
2078 64.439
2079 64.488
2080 64.471
2081 64.288
2082 64.054
2083 63.809
2084 63.598
2085 63.438
2086 63.206
2087 63.048
2088 62.963
2089 62.957
2090 63.036
2091 63.116
2092 63.294
2093 63.578
2094 63.956
2095 64.42
2096 64.85
2097 65.368
2098 65.953
2099 66.584
2100 67.242