Year	Number
1950	56.661
1951	55.873
1952	54.567
1953	53.297
1954	52.322
1955	51.681
1956	50.669
1957	50.246
1958	50.25
1959	50.454
1960	50.709
1961	51.078
1962	51.246
1963	51.223
1964	51.103
1965	50.966
1966	51.022
1967	51.025
1968	51.011
1969	51.018
1970	51.066
1971	51.197
1972	51.344
1973	51.479
1974	51.538
1975	51.501
1976	51.815
1977	51.977
1978	52.018
1979	51.971
1980	51.837
1981	51.562
1982	51.254
1983	50.948
1984	50.671
1985	50.459
1986	50.565
1987	50.735
1988	50.947
1989	51.128
1990	51.169
1991	51.734
1992	52.06
1993	52.162
1994	52.123
1995	52.022
1996	51.203
1997	50.456
1998	49.77
1999	49.082
2000	48.374
2001	48.04
2002	47.733
2003	47.424
2004	47.127
2005	46.871
2006	47.053
2007	47.23
2008	47.486
2009	47.899
2010	48.494
2011	49.413
2012	50.334
2013	51.287
2014	52.328
2015	53.486
2016	54.449
2017	55.696
2018	57.033
2019	58.181
2020	59.018
2021	59.875
2022	60.363
2023	60.601
2024	60.812
2025	61.116
2026	61.527
2027	62.023
2028	62.54
2029	62.93
2030	63.107
2031	63.116
2032	62.991
2033	62.817
2034	62.738
2035	62.857
2036	63.231
2037	63.822
2038	64.556
2039	65.322
2040	66.048
2041	66.786
2042	67.482
2043	68.193
2044	68.977
2045	69.852
2046	70.765
2047	71.753
2048	72.819
2049	73.976
2050	75.234
2051	76.538
2052	77.96
2053	79.403
2054	80.705
2055	81.74
2056	82.442
2057	82.939
2058	83.151
2059	83.012
2060	82.519
2061	81.598
2062	80.351
2063	78.962
2064	77.653
2065	76.532
2066	75.436
2067	74.574
2068	73.937
2069	73.524
2070	73.362
2071	73.394
2072	73.729
2073	74.281
2074	74.904
2075	75.487
2076	75.906
2077	76.29
2078	76.678
2079	77.111
2080	77.594
2081	77.988
2082	78.473
2083	78.995
2084	79.492
2085	79.943
2086	80.27
2087	80.608
2088	80.914
2089	81.163
2090	81.366
2091	81.316
2092	81.195
2093	81.052
2094	80.939
2095	80.869
2096	80.468
2097	80.147
2098	79.926
2099	79.787
2100	79.704