Year	Number
1950	56.517
1951	56.262
1952	55.911
1953	55.678
1954	55.597
1955	55.617
1956	55.657
1957	55.837
1958	56.05
1959	56.212
1960	56.299
1961	56.683
1962	56.943
1963	57.118
1964	57.26
1965	57.382
1966	57.69
1967	57.915
1968	58.072
1969	58.182
1970	58.242
1971	58.438
1972	58.783
1973	59.16
1974	59.45
1975	59.63
1976	59.919
1977	59.96
1978	59.878
1979	59.83
1980	59.879
1981	60.029
1982	60.183
1983	60.357
1984	60.545
1985	60.736
1986	60.592
1987	60.606
1988	60.646
1989	60.582
1990	60.389
1991	60.492
1992	60.376
1993	60.151
1994	59.971
1995	59.896
1996	60.033
1997	60.202
1998	60.369
1999	60.447
2000	60.38
2001	60.34
2002	60.253
2003	60.089
2004	59.84
2005	59.521
2006	59.167
2007	58.739
2008	58.264
2009	57.792
2010	57.357
2011	57.014
2012	56.687
2013	56.387
2014	56.119
2015	55.883
2016	55.698
2017	55.548
2018	55.436
2019	55.367
2020	55.343
2021	55.416
2022	55.527
2023	55.667
2024	55.823
2025	55.989
2026	56.196
2027	56.418
2028	56.634
2029	56.817
2030	56.952
2031	57.053
2032	57.107
2033	57.148
2034	57.225
2035	57.37
2036	57.558
2037	57.805
2038	58.103
2039	58.444
2040	58.82
2041	59.213
2042	59.657
2043	60.117
2044	60.539
2045	60.895
2046	61.157
2047	61.357
2048	61.539
2049	61.766
2050	62.073
2051	62.384
2052	62.776
2053	63.244
2054	63.777
2055	64.37
2056	64.95
2057	65.606
2058	66.311
2059	67.031
2060	67.749
2061	68.355
2062	68.955
2063	69.558
2064	70.167
2065	70.777
2066	71.232
2067	71.695
2068	72.168
2069	72.649
2070	73.138
2071	73.495
2072	73.89
2073	74.303
2074	74.728
2075	75.173
2076	75.473
2077	75.795
2078	76.159
2079	76.572
2080	77.025
2081	77.298
2082	77.626
2083	78.002
2084	78.413
2085	78.852
2086	79.111
2087	79.431
2088	79.796
2089	80.19
2090	80.611
2091	80.842
2092	81.118
2093	81.437
2094	81.798
2095	82.196
2096	82.381
2097	82.621
2098	82.908
2099	83.234
2100	83.588