Year	Number
1950	55.523
1951	55.871
1952	55.88
1953	55.959
1954	56.1
1955	56.206
1956	56.531
1957	56.906
1958	57.249
1959	57.435
1960	57.373
1961	56.937
1962	56.558
1963	56.069
1964	55.327
1965	54.328
1966	53.762
1967	52.813
1968	51.73
1969	50.856
1970	50.351
1971	50.187
1972	50.318
1973	50.643
1974	50.96
1975	51.155
1976	51.412
1977	51.582
1978	51.641
1979	51.559
1980	51.319
1981	51.063
1982	50.607
1983	50.075
1984	49.639
1985	49.391
1986	49.374
1987	49.522
1988	49.751
1989	49.947
1990	50.057
1991	50.313
1992	50.416
1993	50.418
1994	50.4
1995	50.39
1996	50.542
1997	50.937
1998	51.495
1999	52.062
2000	52.524
2001	52.593
2002	52.374
2003	51.912
2004	51.305
2005	50.628
2006	49.816
2007	49.029
2008	48.364
2009	47.938
2010	47.823
2011	47.998
2012	48.378
2013	48.9
2014	49.49
2015	50.111
2016	50.951
2017	51.787
2018	52.593
2019	53.293
2020	53.842
2021	54.389
2022	54.763
2023	55.019
2024	55.229
2025	55.438
2026	55.767
2027	56.086
2028	56.395
2029	56.689
2030	56.969
2031	57.367
2032	57.761
2033	58.145
2034	58.526
2035	58.918
2036	59.456
2037	59.978
2038	60.493
2039	61.009
2040	61.516
2041	62.138
2042	62.766
2043	63.368
2044	63.889
2045	64.296
2046	64.742
2047	65.098
2048	65.405
2049	65.743
2050	66.17
2051	66.792
2052	67.504
2053	68.271
2054	69.02
2055	69.699
2056	70.347
2057	70.93
2058	71.469
2059	72.004
2060	72.559
2061	73.148
2062	73.756
2063	74.365
2064	74.946
2065	75.474
2066	75.967
2067	76.436
2068	76.861
2069	77.207
2070	77.45
2071	77.59
2072	77.664
2073	77.679
2074	77.662
2075	77.644
2076	77.593
2077	77.557
2078	77.555
2079	77.593
2080	77.656
2081	77.667
2082	77.754
2083	77.891
2084	78.05
2085	78.229
2086	78.367
2087	78.551
2088	78.784
2089	79.06
2090	79.363
2091	79.565
2092	79.826
2093	80.127
2094	80.447
2095	80.775
2096	80.968
2097	81.204
2098	81.473
2099	81.757
2100	82.041