Year	Number
1950	56.746
1951	59.705
1952	62.37
1953	64.992
1954	67.545
1955	69.882
1956	71.785
1957	73.679
1958	75.561
1959	77.353
1960	79.161
1961	78.905
1962	78.688
1963	78.822
1964	79.283
1965	79.912
1966	79.325
1967	78.97
1968	78.691
1969	78.298
1970	77.673
1971	78.074
1972	78.112
1973	77.824
1974	77.278
1975	76.452
1976	73.625
1977	70.94
1978	68.466
1979	66.191
1980	64.183
1981	62.676
1982	61.239
1983	60.228
1984	59.804
1985	59.837
1986	59.323
1987	59.617
1988	60.544
1989	61.698
1990	62.645
1991	63.269
1992	63.627
1993	63.764
1994	63.844
1995	63.974
1996	64.431
1997	64.686
1998	64.851
1999	65.074
2000	65.46
2001	65.74
2002	65.949
2003	65.974
2004	65.711
2005	65.165
2006	64.697
2007	64.544
2008	64.616
2009	64.823
2010	65.059
2011	64.922
2012	64.545
2013	64.056
2014	63.583
2015	63.193
2016	62.82
2017	62.518
2018	62.253
2019	61.971
2020	61.647
2021	61.283
2022	60.932
2023	60.597
2024	60.293
2025	60.034
2026	59.857
2027	59.692
2028	59.582
2029	59.57
2030	59.68
2031	59.857
2032	60.11
2033	60.437
2034	60.815
2035	61.222
2036	61.581
2037	61.951
2038	62.318
2039	62.665
2040	62.988
2041	63.204
2042	63.378
2043	63.511
2044	63.594
2045	63.619
2046	63.492
2047	63.319
2048	63.103
2049	62.849
2050	62.565
2051	62.178
2052	61.775
2053	61.386
2054	61.055
2055	60.809
2056	60.558
2057	60.387
2058	60.3
2059	60.29
2060	60.347
2061	60.38
2062	60.484
2063	60.654
2064	60.873
2065	61.136
2066	61.34
2067	61.585
2068	61.876
2069	62.217
2070	62.609
2071	62.931
2072	63.303
2073	63.713
2074	64.147
2075	64.594
2076	64.926
2077	65.272
2078	65.63
2079	66
2080	66.383
2081	66.612
2082	66.851
2083	67.116
2084	67.419
2085	67.758
2086	67.949
2087	68.186
2088	68.467
2089	68.791
2090	69.161
2091	69.392
2092	69.68
2093	70.025
2094	70.423
2095	70.872
2096	71.171
2097	71.525
2098	71.931
2099	72.39
2100	72.905