Year Number
1950 80.87
1951 81.245
1952 81.193
1953 80.918
1954 80.518
1955 80.01
1956 80.388
1957 80.563
1958 80.532
1959 80.321
1960 79.979
1961 80.678
1962 81.052
1963 81.202
1964 81.228
1965 81.174
1966 81.926
1967 82.45
1968 82.796
1969 83.012
1970 83.136
1971 83.937
1972 84.597
1973 85.119
1974 85.505
1975 85.779
1976 86.615
1977 87.144
1978 87.465
1979 87.675
1980 87.804
1981 88.989
1982 89.971
1983 90.743
1984 91.278
1985 91.559
1986 92.148
1987 92.373
1988 92.283
1989 91.935
1990 91.37
1991 91.269
1992 90.901
1993 90.31
1994 89.548
1995 88.668
1996 88.427
1997 87.995
1998 87.439
1999 86.837
2000 86.243
2001 86.388
2002 86.428
2003 86.399
2004 86.328
2005 86.232
2006 86.726
2007 87.063
2008 87.279
2009 87.408
2010 87.465
2011 87.824
2012 88.066
2013 88.158
2014 88.044
2015 87.708
2016 87.623
2017 87.242
2018 86.639
2019 85.915
2020 85.127
2021 84.513
2022 83.838
2023 83.081
2024 82.212
2025 81.236
2026 80.515
2027 79.666
2028 78.732
2029 77.776
2030 76.835
2031 76.166
2032 75.467
2033 74.748
2034 74.01
2035 73.26
2036 72.739
2037 72.166
2038 71.554
2039 70.914
2040 70.257
2041 69.781
2042 69.253
2043 68.678
2044 68.064
2045 67.417
2046 66.919
2047 66.364
2048 65.761
2049 65.119
2050 64.447
2051 63.909
2052 63.324
2053 62.704
2054 62.059
2055 61.401
2056 60.877
2057 60.322
2058 59.749
2059 59.169
2060 58.594
2061 58.162
2062 57.711
2063 57.254
2064 56.802
2065 56.366
2066 56.067
2067 55.762
2068 55.455
2069 55.147
2070 54.845
2071 54.662
2072 54.46
2073 54.248
2074 54.036
2075 53.829
2076 53.728
2077 53.611
2078 53.48
2079 53.333
2080 53.176
2081 53.095
2082 52.987
2083 52.859
2084 52.718
2085 52.572
2086 52.512
2087 52.431
2088 52.335
2089 52.233
2090 52.132
2091 52.113
2092 52.078
2093 52.035
2094 51.988
2095 51.945
2096 51.994
2097 52.03
2098 52.057
2099 52.082
2100 52.109