Year	Number
1950	77.469
1951	75.745
1952	74.201
1953	72.7
1954	71.238
1955	69.887
1956	69.949
1957	69.772
1958	69.543
1959	69.428
1960	69.486
1961	69.562
1962	69.883
1963	70.235
1964	70.231
1965	69.626
1966	69.776
1967	69.372
1968	68.542
1969	67.669
1970	67.072
1971	65.623
1972	64.478
1973	63.5
1974	62.409
1975	61.063
1976	60.103
1977	58.834
1978	57.4
1979	56.043
1980	54.892
1981	53.619
1982	52.633
1983	51.849
1984	51.113
1985	50.358
1986	50.512
1987	50.533
1988	50.5
1989	50.566
1990	50.792
1991	50.282
1992	50.047
1993	49.972
1994	49.896
1995	49.748
1996	49.821
1997	49.754
1998	49.578
1999	49.394
2000	49.282
2001	49.394
2002	49.565
2003	49.763
2004	49.868
2005	49.794
2006	49.663
2007	49.411
2008	49.057
2009	48.675
2010	48.316
2011	48.109
2012	47.824
2013	47.578
2014	47.517
2015	47.71
2016	48.103
2017	48.778
2018	49.598
2019	50.338
2020	50.876
2021	51.388
2022	51.689
2023	51.866
2024	52.069
2025	52.386
2026	52.851
2027	53.399
2028	53.988
2029	54.509
2030	54.916
2031	55.284
2032	55.552
2033	55.757
2034	55.963
2035	56.22
2036	56.547
2037	56.908
2038	57.292
2039	57.682
2040	58.071
2041	58.5
2042	58.906
2043	59.325
2044	59.805
2045	60.366
2046	61.066
2047	61.866
2048	62.688
2049	63.415
2050	63.985
2051	64.495
2052	64.854
2053	65.128
2054	65.423
2055	65.791
2056	66.259
2057	66.809
2058	67.411
2059	68.025
2060	68.637
2061	69.269
2062	69.915
2063	70.566
2064	71.2
2065	71.794
2066	72.319
2067	72.807
2068	73.276
2069	73.757
2070	74.275
2071	74.792
2072	75.357
2073	75.951
2074	76.517
2075	77.008
2076	77.381
2077	77.726
2078	78.03
2079	78.292
2080	78.531
2081	78.698
2082	78.861
2083	79.03
2084	79.212
2085	79.395
2086	79.447
2087	79.537
2088	79.653
2089	79.788
2090	79.938
2091	79.98
2092	80.081
2093	80.23
2094	80.412
2095	80.619
2096	80.725
2097	80.878
2098	81.068
2099	81.293
2100	81.552