Year	Number
1950	66.267
1951	67.393
1952	68.624
1953	69.406
1954	69.666
1955	69.565
1956	70.975
1957	71.668
1958	72.016
1959	72.299
1960	72.589
1961	73.562
1962	74.491
1963	75.276
1964	75.744
1965	75.862
1966	76.726
1967	77.242
1968	77.406
1969	77.134
1970	76.31
1971	81.126
1972	85.909
1973	90.651
1974	95.535
1975	100.738
1976	101.062
1977	100.774
1978	100.035
1979	99.236
1980	98.881
1981	88.005
1982	79.882
1983	73.918
1984	69.449
1985	66.036
1986	67.281
1987	68.521
1988	69.912
1989	71.617
1990	73.626
1991	76.586
1992	79.35
1993	81.899
1994	84.111
1995	85.873
1996	87.159
1997	88.068
1998	88.483
1999	88.274
2000	87.454
2001	86.704
2002	85.345
2003	83.626
2004	81.854
2005	80.188
2006	79.226
2007	78.289
2008	77.381
2009	76.456
2010	75.509
2011	75.024
2012	74.423
2013	73.805
2014	73.269
2015	72.851
2016	72.808
2017	72.782
2018	72.764
2019	72.723
2020	72.64
2021	72.778
2022	72.807
2023	72.742
2024	72.601
2025	72.392
2026	72.274
2027	72.045
2028	71.715
2029	71.289
2030	70.772
2031	70.301
2032	69.722
2033	69.049
2034	68.287
2035	67.449
2036	66.658
2037	65.783
2038	64.849
2039	63.874
2040	62.876
2041	61.946
2042	60.984
2043	60.028
2044	59.116
2045	58.271
2046	57.581
2047	56.923
2048	56.309
2049	55.752
2050	55.257
2051	54.916
2052	54.608
2053	54.327
2054	54.056
2055	53.785
2056	53.595
2057	53.395
2058	53.19
2059	52.983
2060	52.778
2061	52.63
2062	52.472
2063	52.313
2064	52.157
2065	52.01
2066	51.899
2067	51.79
2068	51.692
2069	51.615
2070	51.568
2071	51.565
2072	51.577
2073	51.611
2074	51.673
2075	51.765
2076	51.887
2077	52.026
2078	52.187
2079	52.371
2080	52.579
2081	52.804
2082	53.044
2083	53.299
2084	53.567
2085	53.849
2086	54.129
2087	54.416
2088	54.713
2089	55.019
2090	55.335
2091	55.629
2092	55.928
2093	56.236
2094	56.558
2095	56.895
2096	57.202
2097	57.521
2098	57.857
2099	58.211
2100	58.585