Year	Number
1950	49.145
1951	49.685
1952	50.142
1953	50.711
1954	51.302
1955	51.764
1956	52.007
1957	52.231
1958	52.358
1959	52.361
1960	52.278
1961	52.819
1962	53.041
1963	53.038
1964	52.925
1965	52.761
1966	53.061
1967	53.31
1968	53.528
1969	53.693
1970	53.775
1971	54.119
1972	54.317
1973	54.37
1974	54.254
1975	53.946
1976	53.673
1977	53.287
1978	52.728
1979	51.979
1980	51.098
1981	50.129
1982	49.085
1983	48.078
1984	47.223
1985	46.573
1986	46.337
1987	46.164
1988	46.07
1989	46.076
1990	46.194
1991	46.418
1992	46.765
1993	47.17
1994	47.522
1995	47.745
1996	48.166
1997	48.457
1998	48.615
1999	48.68
2000	48.674
2001	48.448
2002	48.17
2003	47.862
2004	47.553
2005	47.274
2006	47.031
2007	46.872
2008	46.805
2009	46.837
2010	46.977
2011	47.214
2012	47.515
2013	47.907
2014	48.37
2015	48.848
2016	49.429
2017	50.012
2018	50.611
2019	51.244
2020	51.935
2021	52.796
2022	53.693
2023	54.646
2024	55.689
2025	56.836
2026	57.994
2027	59.258
2028	60.59
2029	61.931
2030	63.248
2031	64.484
2032	65.69
2033	66.834
2034	67.87
2035	68.77
2036	69.417
2037	69.935
2038	70.36
2039	70.731
2040	71.081
2041	71.296
2042	71.51
2043	71.748
2044	72.057
2045	72.482
2046	72.887
2047	73.412
2048	74.036
2049	74.705
2050	75.374
2051	75.86
2052	76.353
2053	76.859
2054	77.376
2055	77.899
2056	78.24
2057	78.61
2058	78.986
2059	79.321
2060	79.59
2061	79.64
2062	79.678
2063	79.685
2064	79.657
2065	79.615
2066	79.393
2067	79.172
2068	78.973
2069	78.824
2070	78.733
2071	78.451
2072	78.239
2073	78.112
2074	78.067
2075	78.091
2076	77.937
2077	77.893
2078	77.941
2079	78.069
2080	78.292
2081	78.385
2082	78.583
2083	78.885
2084	79.271
2085	79.72
2086	79.966
2087	80.285
2088	80.661
2089	81.084
2090	81.555
2091	81.805
2092	82.1
2093	82.439
2094	82.821
2095	83.24
2096	83.397
2097	83.594
2098	83.831
2099	84.109
2100	84.433