Year	Number
1950	55.253
1951	57.686
1952	59.726
1953	61.578
1954	63.162
1955	64.417
1956	65.964
1957	67.279
1958	68.379
1959	69.244
1960	69.848
1961	70
1962	70.21
1963	70.247
1964	69.887
1965	69.089
1966	68.343
1967	67.22
1968	65.998
1969	65.097
1970	64.744
1971	64.749
1972	65.228
1973	66.012
1974	66.811
1975	67.471
1976	68.65
1977	69.592
1978	70.343
1979	70.975
1980	71.49
1981	71.598
1982	71.606
1983	71.492
1984	71.226
1985	70.82
1986	70.152
1987	69.461
1988	68.716
1989	67.903
1990	67.044
1991	66.255
1992	65.384
1993	64.516
1994	63.776
1995	63.223
1996	62.655
1997	62.267
1998	62.014
1999	61.801
2000	61.576
2001	61.493
2002	61.333
2003	61.153
2004	61.026
2005	60.982
2006	60.59
2007	60.336
2008	60.217
2009	60.243
2010	60.444
2011	61.05
2012	61.788
2013	62.606
2014	63.413
2015	64.129
2016	64.956
2017	65.571
2018	66.028
2019	66.404
2020	66.722
2021	66.677
2022	66.684
2023	66.663
2024	66.5
2025	66.167
2026	65.78
2027	65.248
2028	64.65
2029	64.107
2030	63.685
2031	63.291
2032	63.001
2033	62.824
2034	62.751
2035	62.781
2036	62.828
2037	62.965
2038	63.192
2039	63.493
2040	63.842
2041	64.125
2042	64.457
2043	64.817
2044	65.173
2045	65.509
2046	65.737
2047	65.951
2048	66.144
2049	66.313
2050	66.46
2051	66.472
2052	66.468
2053	66.451
2054	66.423
2055	66.379
2056	66.176
2057	65.976
2058	65.792
2059	65.645
2060	65.554
2061	65.372
2062	65.259
2063	65.217
2064	65.236
2065	65.304
2066	65.269
2067	65.304
2068	65.41
2069	65.584
2070	65.832
2071	65.989
2072	66.224
2073	66.545
2074	66.969
2075	67.501
2076	67.959
2077	68.526
2078	69.172
2079	69.846
2080	70.514
2081	70.972
2082	71.428
2083	71.886
2084	72.355
2085	72.846
2086	73.132
2087	73.436
2088	73.77
2089	74.142
2090	74.548
2091	74.739
2092	74.985
2093	75.282
2094	75.627
2095	76.025
2096	76.234
2097	76.503
2098	76.84
2099	77.257
2100	77.762