Year	Number
1950	51.509
1951	52.067
1952	52.079
1953	51.721
1954	51.44
1955	51.536
1956	52.188
1957	53.093
1958	54.175
1959	55.089
1960	55.528
1961	55.657
1962	55.32
1963	54.653
1964	53.987
1965	53.553
1966	52.687
1967	52.526
1968	52.723
1969	52.768
1970	52.454
1971	53.295
1972	53.17
1973	52.663
1974	52.594
1975	53.29
1976	53.802
1977	55.302
1978	57.204
1979	58.508
1980	58.702
1981	58.645
1982	57.458
1983	55.643
1984	54.025
1985	53.024
1986	52.24
1987	52.102
1988	52.304
1989	52.318
1990	51.87
1991	51.959
1992	51.378
1993	50.405
1994	49.511
1995	48.931
1996	48.174
1997	47.939
1998	47.965
1999	47.835
2000	47.371
2001	47.323
2002	46.898
2003	46.233
2004	45.605
2005	45.151
2006	45.004
2007	45.122
2008	45.446
2009	45.865
2010	46.334
2011	46.772
2012	47.184
2013	47.61
2014	48.159
2015	48.886
2016	49.543
2017	50.389
2018	51.341
2019	52.228
2020	52.966
2021	53.764
2022	54.418
2023	54.898
2024	55.181
2025	55.259
2026	55.185
2027	54.886
2028	54.559
2029	54.463
2030	54.752
2031	55.524
2032	56.71
2033	58.159
2034	59.636
2035	61.004
2036	62.406
2037	63.682
2038	64.895
2039	66.158
2040	67.521
2041	69.039
2042	70.629
2043	72.194
2044	73.566
2045	74.635
2046	75.477
2047	76.002
2048	76.328
2049	76.643
2050	77.058
2051	77.62
2052	78.343
2053	79.037
2054	79.449
2055	79.457
2056	79.146
2057	78.438
2058	77.528
2059	76.668
2060	75.969
2061	75.411
2062	75.052
2063	74.819
2064	74.622
2065	74.439
2066	74.431
2067	74.487
2068	74.638
2069	74.903
2070	75.26
2071	75.764
2072	76.423
2073	77.128
2074	77.757
2075	78.262
2076	78.687
2077	78.987
2078	79.224
2079	79.455
2080	79.67
2081	79.771
2082	79.929
2083	80.067
2084	80.132
2085	80.149
2086	80.068
2087	79.955
2088	79.856
2089	79.803
2090	79.782
2091	79.581
2092	79.45
2093	79.37
2094	79.33
2095	79.34
2096	79.249
2097	79.245
2098	79.343
2099	79.531
2100	79.781