Year	Number
1950	76.87
1951	77.788
1952	78.561
1953	79.018
1954	79.148
1955	79.027
1956	79.915
1957	80.355
1958	80.56
1959	80.712
1960	80.872
1961	81.521
1962	82.175
1963	82.743
1964	83.078
1965	83.135
1966	83.631
1967	83.795
1968	83.786
1969	83.859
1970	84.154
1971	84.969
1972	86.07
1973	87.264
1974	88.225
1975	88.771
1976	90.032
1977	90.452
1978	90.369
1979	90.231
1980	90.216
1981	89.897
1982	89.887
1983	89.863
1984	89.359
1985	88.205
1986	87.251
1987	85.668
1988	83.746
1989	81.909
1990	80.366
1991	79.148
1992	78.212
1993	77.464
1994	76.754
1995	76.028
1996	75.745
1997	75.415
1998	75.074
1999	74.765
2000	74.485
2001	74.561
2002	74.506
2003	74.359
2004	74.152
2005	73.888
2006	73.602
2007	73.313
2008	72.944
2009	72.396
2010	71.636
2011	70.992
2012	70.12
2013	69.106
2014	68.074
2015	67.09
2016	66.265
2017	65.483
2018	64.717
2019	63.924
2020	63.09
2021	62.455
2022	61.77
2023	61.061
2024	60.367
2025	59.706
2026	59.235
2027	58.771
2028	58.311
2029	57.845
2030	57.37
2031	57.041
2032	56.683
2033	56.314
2034	55.961
2035	55.635
2036	55.474
2037	55.31
2038	55.127
2039	54.9
2040	54.624
2041	54.447
2042	54.209
2043	53.924
2044	53.61
2045	53.278
2046	53.063
2047	52.819
2048	52.544
2049	52.235
2050	51.895
2051	51.673
2052	51.412
2053	51.127
2054	50.838
2055	50.558
2056	50.424
2057	50.28
2058	50.134
2059	49.996
2060	49.873
2061	49.907
2062	49.932
2063	49.946
2064	49.943
2065	49.924
2066	50.022
2067	50.088
2068	50.127
2069	50.141
2070	50.135
2071	50.246
2072	50.32
2073	50.36
2074	50.369
2075	50.352
2076	50.437
2077	50.485
2078	50.502
2079	50.495
2080	50.472
2081	50.565
2082	50.626
2083	50.663
2084	50.683
2085	50.694
2086	50.828
2087	50.937
2088	51.028
2089	51.103
2090	51.167
2091	51.353
2092	51.514
2093	51.656
2094	51.781
2095	51.893
2096	52.121
2097	52.323
2098	52.503
2099	52.665
2100	52.812