Year	Number
1950	48.67
1951	49.397
1952	50.39
1953	51.076
1954	51.346
1955	51.322
1956	52.068
1957	52.229
1958	52.161
1959	52.145
1960	52.247
1961	51.887
1962	51.728
1963	51.621
1964	51.362
1965	50.893
1966	50.294
1967	49.726
1968	49.157
1969	48.585
1970	48.041
1971	48.186
1972	48.067
1973	47.946
1974	48.185
1975	48.941
1976	49.927
1977	51.557
1978	53.425
1979	54.8
1980	55.244
1981	55.485
1982	54.557
1983	53.004
1984	51.685
1985	51.027
1986	50.443
1987	50.724
1988	51.38
1989	51.678
1990	51.287
1991	51.303
1992	50.596
1993	49.502
1994	48.521
1995	47.869
1996	47.576
1997	47.435
1998	47.38
1999	47.253
2000	46.984
2001	46.625
2002	46.302
2003	45.988
2004	45.675
2005	45.376
2006	45.429
2007	45.459
2008	45.492
2009	45.565
2010	45.698
2011	46.043
2012	46.359
2013	46.725
2014	47.223
2015	47.878
2016	48.698
2017	49.721
2018	50.818
2019	51.808
2020	52.597
2021	53.451
2022	54.089
2023	54.532
2024	54.824
2025	54.984
2026	55.073
2027	55.035
2028	54.927
2029	54.826
2030	54.788
2031	54.931
2032	55.146
2033	55.428
2034	55.761
2035	56.135
2036	56.654
2037	57.214
2038	57.855
2039	58.648
2040	59.64
2041	60.963
2042	62.488
2043	64.106
2044	65.613
2045	66.859
2046	67.952
2047	68.781
2048	69.421
2049	70.004
2050	70.618
2051	71.314
2052	72.029
2053	72.738
2054	73.41
2055	74.036
2056	74.641
2057	75.207
2058	75.702
2059	76.065
2060	76.246
2061	76.227
2062	76.042
2063	75.731
2064	75.369
2065	75.013
2066	74.696
2067	74.39
2068	74.13
2069	73.926
2070	73.759
2071	73.681
2072	73.722
2073	73.809
2074	73.868
2075	73.886
2076	73.943
2077	73.969
2078	74.009
2079	74.108
2080	74.268
2081	74.428
2082	74.662
2083	74.947
2084	75.244
2085	75.528
2086	75.756
2087	76.013
2088	76.276
2089	76.527
2090	76.769
2091	76.921
2092	77.07
2093	77.223
2094	77.387
2095	77.556
2096	77.574
2097	77.618
2098	77.688
2099	77.774
2100	77.866