Year	Number
1950	42.799
1951	44.422
1952	46.025
1953	48.714
1954	52.58
1955	57.129
1956	60.995
1957	66.097
1958	71.444
1959	76.118
1960	79.923
1961	83.73
1962	85.813
1963	87.235
1964	88.683
1965	89.824
1966	91.469
1967	91.351
1968	89.435
1969	86.082
1970	81.795
1971	76.177
1972	71.298
1973	66.999
1974	63.01
1975	59.166
1976	57.07
1977	54.67
1978	52.345
1979	50.694
1980	50.084
1981	49.002
1982	48.591
1983	48.607
1984	48.529
1985	48.071
1986	48.628
1987	48.558
1988	48.122
1989	47.63
1990	47.2
1991	48.124
1992	48.691
1993	49.052
1994	49.219
1995	49.117
1996	48.476
1997	47.657
1998	46.549
1999	45.065
2000	43.267
2001	40.499
2002	37.997
2003	35.853
2004	34.086
2005	32.635
2006	30.874
2007	29.064
2008	27.36
2009	25.923
2010	24.881
2011	25.034
2012	25.456
2013	26.17
2014	27.108
2015	28.209
2016	29.764
2017	31.34
2018	32.998
2019	34.816
2020	36.811
2021	38.727
2022	40.847
2023	43.047
2024	45.153
2025	47.079
2026	48.908
2027	50.527
2028	51.942
2029	53.194
2030	54.315
2031	55.21
2032	55.928
2033	56.525
2034	57.075
2035	57.637
2036	58.092
2037	58.583
2038	59.084
2039	59.541
2040	59.936
2041	60.192
2042	60.378
2043	60.614
2044	61.069
2045	61.845
2046	62.825
2047	64.091
2048	65.602
2049	67.262
2050	68.995
2051	70.72
2052	72.524
2053	74.341
2054	76.067
2055	77.619
2056	78.894
2057	79.979
2058	80.855
2059	81.526
2060	82.017
2061	82.187
2062	82.181
2063	82.018
2064	81.7
2065	81.227
2066	80.426
2067	79.542
2068	78.597
2069	77.655
2070	76.791
2071	75.812
2072	74.903
2073	74.151
2074	73.625
2075	73.322
2076	72.985
2077	72.92
2078	73.056
2079	73.283
2080	73.557
2081	73.743
2082	74.023
2083	74.374
2084	74.786
2085	75.266
2086	75.64
2087	76.063
2088	76.539
2089	77.066
2090	77.633
2091	78.01
2092	78.413
2093	78.828
2094	79.252
2095	79.689
2096	79.884
2097	80.073
2098	80.278
2099	80.529
2100	80.832