Year	Number
1950	58.917
1951	59.117
1952	58.664
1953	58.424
1954	58.919
1955	60.308
1956	62.774
1957	65.855
1958	69.399
1959	73.116
1960	76.801
1961	80.545
1962	84.09
1963	87.291
1964	89.924
1965	91.811
1966	93.349
1967	93.915
1968	93.667
1969	92.929
1970	91.91
1971	90.285
1972	88.997
1973	87.818
1974	86.378
1975	84.513
1976	82.925
1977	80.825
1978	78.548
1979	76.571
1980	75.108
1981	73.95
1982	73.353
1983	73.191
1984	73.152
1985	73.045
1986	73.49
1987	73.708
1988	73.802
1989	73.933
1990	74.133
1991	74.87
1992	75.435
1993	75.774
1994	75.796
1995	75.459
1996	74.366
1997	73.042
1998	71.529
1999	69.831
2000	67.924
2001	66.328
2002	64.525
2003	62.453
2004	60.192
2005	57.923
2006	56.43
2007	55.002
2008	53.819
2009	53.002
2010	52.574
2011	52.635
2012	53.053
2013	53.725
2014	54.516
2015	55.348
2016	56.697
2017	57.782
2018	58.709
2019	59.623
2020	60.543
2021	60.696
2022	61.155
2023	61.618
2024	61.701
2025	61.269
2026	60.846
2027	59.917
2028	58.682
2029	57.477
2030	56.474
2031	55.566
2032	54.833
2033	54.27
2034	53.805
2035	53.402
2036	53.134
2037	52.939
2038	52.811
2039	52.741
2040	52.716
2041	52.745
2042	52.799
2043	52.881
2044	52.985
2045	53.104
2046	53.251
2047	53.385
2048	53.544
2049	53.78
2050	54.117
2051	54.573
2052	55.105
2053	55.649
2054	56.115
2055	56.447
2056	56.675
2057	56.782
2058	56.776
2059	56.674
2060	56.488
2061	56.239
2062	55.925
2063	55.55
2064	55.107
2065	54.601
2066	54.064
2067	53.488
2068	52.929
2069	52.462
2070	52.131
2071	51.955
2072	51.883
2073	51.949
2074	52.203
2075	52.664
2076	53.364
2077	54.259
2078	55.265
2079	56.24
2080	57.087
2081	57.853
2082	58.491
2083	59.019
2084	59.474
2085	59.886
2086	60.251
2087	60.567
2088	60.835
2089	61.054
2090	61.226
2091	61.315
2092	61.373
2093	61.414
2094	61.464
2095	61.545
2096	61.587
2097	61.657
2098	61.765
2099	61.925
2100	62.145