Year	Number
1950	86.885
1951	84.965
1952	80.657
1953	76.183
1954	73.396
1955	72.693
1956	69.468
1957	69.276
1958	70.269
1959	70.547
1960	69.323
1961	71.155
1962	69.636
1963	66.758
1964	65.322
1965	66.507
1966	66.431
1967	70.01
1968	75.381
1969	79.546
1970	81.048
1971	83.266
1972	82.353
1973	79.655
1974	77.087
1975	75.364
1976	73.397
1977	71.748
1978	70.206
1979	68.403
1980	66.27
1981	63.01
1982	60.581
1983	58.486
1984	56.18
1985	53.522
1986	52.315
1987	50.12
1988	47.675
1989	45.921
1990	45.202
1991	44.578
1992	45.025
1993	46.099
1994	47.042
1995	47.469
1996	47.94
1997	47.871
1998	47.45
1999	47.07
2000	46.927
2001	46.929
2002	47.104
2003	47.349
2004	47.477
2005	47.4
2006	47.367
2007	47.099
2008	46.673
2009	46.234
2010	45.865
2011	45.548
2012	45.386
2013	45.244
2014	44.913
2015	44.314
2016	43.786
2017	42.96
2018	42.084
2019	41.499
2020	41.367
2021	41.698
2022	42.42
2023	43.34
2024	44.159
2025	44.716
2026	45.236
2027	45.511
2028	45.679
2029	45.958
2030	46.468
2031	47.305
2032	48.284
2033	49.341
2034	50.39
2035	51.382
2036	52.438
2037	53.47
2038	54.368
2039	54.973
2040	55.202
2041	55.169
2042	54.78
2043	54.202
2044	53.688
2045	53.394
2046	53.398
2047	53.558
2048	53.829
2049	54.124
2050	54.376
2051	54.747
2052	55.065
2053	55.377
2054	55.705
2055	56.077
2056	56.657
2057	57.246
2058	57.826
2059	58.37
2060	58.849
2061	59.422
2062	59.923
2063	60.354
2064	60.738
2065	61.077
2066	61.512
2067	61.923
2068	62.279
2069	62.549
2070	62.735
2071	62.935
2072	63.044
2073	63.11
2074	63.199
2075	63.339
2076	63.558
2077	63.828
2078	64.136
2079	64.465
2080	64.812
2081	65.229
2082	65.668
2083	66.13
2084	66.613
2085	67.107
2086	67.63
2087	68.174
2088	68.722
2089	69.257
2090	69.771
2091	70.252
2092	70.727
2093	71.186
2094	71.618
2095	72.011
2096	72.32
2097	72.617
2098	72.896
2099	73.155
2100	73.399