Year	Number
1950	67.404
1951	67.586
1952	67.916
1953	68.215
1954	68.439
1955	68.612
1956	69.105
1957	69.253
1958	69.257
1959	69.319
1960	69.511
1961	69.703
1962	69.998
1963	70.364
1964	70.654
1965	70.765
1966	70.847
1967	70.73
1968	70.475
1969	70.249
1970	70.144
1971	70.818
1972	71.406
1973	71.674
1974	71.32
1975	70.251
1976	71.17
1977	70.982
1978	70.138
1979	69.209
1980	68.451
1981	67.883
1982	67.687
1983	67.538
1984	66.994
1985	65.902
1986	64.777
1987	63.185
1988	61.378
1989	59.718
1990	58.391
1991	57.223
1992	56.379
1993	55.729
1994	55.086
1995	54.373
1996	54.284
1997	53.954
1998	53.534
1999	53.167
2000	52.886
2001	52.501
2002	52.197
2003	51.891
2004	51.491
2005	50.974
2006	50.543
2007	50.142
2008	49.771
2009	49.479
2010	49.323
2011	48.931
2012	48.584
2013	48.307
2014	48.088
2015	47.92
2016	47.9
2017	47.891
2018	47.911
2019	47.974
2020	48.084
2021	48.286
2022	48.524
2023	48.786
2024	49.07
2025	49.377
2026	49.777
2027	50.182
2028	50.584
2029	50.981
2030	51.368
2031	51.781
2032	52.16
2033	52.529
2034	52.921
2035	53.351
2036	53.832
2037	54.331
2038	54.825
2039	55.274
2040	55.653
2041	55.957
2042	56.192
2043	56.375
2044	56.527
2045	56.667
2046	56.763
2047	56.842
2048	56.931
2049	57.07
2050	57.281
2051	57.543
2052	57.861
2053	58.254
2054	58.735
2055	59.309
2056	59.925
2057	60.638
2058	61.407
2059	62.165
2060	62.885
2061	63.51
2062	64.089
2063	64.639
2064	65.172
2065	65.689
2066	66.099
2067	66.501
2068	66.895
2069	67.287
2070	67.693
2071	68.01
2072	68.344
2073	68.706
2074	69.105
2075	69.546
2076	69.882
2077	70.262
2078	70.684
2079	71.14
2080	71.621
2081	71.959
2082	72.328
2083	72.732
2084	73.164
2085	73.617
2086	73.92
2087	74.271
2088	74.651
2089	75.05
2090	75.472
2091	75.752
2092	76.062
2093	76.41
2094	76.801
2095	77.235
2096	77.494
2097	77.803
2098	78.15
2099	78.53
2100	78.939