Year Number
1950 82.6
1951 83.507
1952 85.128
1953 86.34
1954 86.968
1955 87.315
1956 90.276
1957 92.297
1958 94.033
1959 96.002
1960 98.319
1961 100.151
1962 102.475
1963 104.88
1964 106.707
1965 107.655
1966 108.022
1967 107.638
1968 106.714
1969 105.607
1970 104.523
1971 103.562
1972 102.5
1973 101.437
1974 100.449
1975 99.587
1976 98.742
1977 97.996
1978 97.334
1979 96.697
1980 96.044
1981 96.222
1982 96.203
1983 96.023
1984 95.703
1985 95.226
1986 94.739
1987 93.981
1988 92.948
1989 91.62
1990 89.997
1991 88.164
1992 86.125
1993 83.922
1994 81.601
1995 79.212
1996 77.446
1997 75.586
1998 73.667
1999 71.723
2000 69.785
2001 68.459
2002 67.06
2003 65.658
2004 64.333
2005 63.129
2006 61.705
2007 60.469
2008 59.393
2009 58.438
2010 57.597
2011 56.943
2012 56.404
2013 55.967
2014 55.601
2015 55.27
2016 55.294
2017 55.179
2018 54.985
2019 54.792
2020 54.615
2021 54.263
2022 53.997
2023 53.718
2024 53.292
2025 52.67
2026 52.041
2027 51.239
2028 50.334
2029 49.437
2030 48.612
2031 47.903
2032 47.249
2033 46.657
2034 46.118
2035 45.628
2036 45.278
2037 44.974
2038 44.732
2039 44.571
2040 44.502
2041 44.584
2042 44.726
2043 44.932
2044 45.201
2045 45.53
2046 45.957
2047 46.423
2048 46.91
2049 47.4
2050 47.875
2051 48.363
2052 48.822
2053 49.248
2054 49.637
2055 49.987
2056 50.306
2057 50.571
2058 50.793
2059 50.983
2060 51.153
2061 51.309
2062 51.435
2063 51.537
2064 51.617
2065 51.68
2066 51.752
2067 51.802
2068 51.846
2069 51.901
2070 51.979
2071 52.119
2072 52.264
2073 52.439
2074 52.674
2075 52.986
2076 53.423
2077 53.923
2078 54.464
2079 55.008
2080 55.529
2081 56.08
2082 56.602
2083 57.097
2084 57.569
2085 58.019
2086 58.475
2087 58.899
2088 59.294
2089 59.662
2090 60.003
2091 60.333
2092 60.634
2093 60.911
2094 61.174
2095 61.429
2096 61.681
2097 61.922
2098 62.159
2099 62.4
2100 62.646