Year	Number
1950	69.63
1951	71.109
1952	72.91
1953	74.286
1954	74.972
1955	75.063
1956	76.463
1957	76.836
1958	76.681
1959	76.461
1960	76.344
1961	76.735
1962	77.318
1963	77.862
1964	78
1965	77.62
1966	77.913
1967	77.621
1968	77.005
1969	76.423
1970	76.042
1971	76.611
1972	77.207
1973	77.823
1974	78.388
1975	78.861
1976	80.141
1977	81.224
1978	82.171
1979	83.072
1980	83.985
1981	85.542
1982	87.047
1983	88.443
1984	89.61
1985	90.477
1986	92.059
1987	93.039
1988	93.584
1989	93.906
1990	94.099
1991	94.602
1992	94.946
1993	95.048
1994	94.751
1995	94.006
1996	93.719
1997	92.904
1998	91.732
1999	90.418
2000	89.08
2001	88.25
2002	87.324
2003	86.33
2004	85.27
2005	84.159
2006	83.615
2007	82.936
2008	82.171
2009	81.382
2010	80.61
2011	80.305
2012	79.909
2013	79.461
2014	78.974
2015	78.448
2016	78.351
2017	78.089
2018	77.683
2019	77.153
2020	76.51
2021	76.054
2022	75.459
2023	74.735
2024	73.881
2025	72.912
2026	72.164
2027	71.277
2028	70.292
2029	69.26
2030	68.215
2031	67.443
2032	66.618
2033	65.768
2034	64.911
2035	64.06
2036	63.481
2037	62.866
2038	62.234
2039	61.601
2040	60.975
2041	60.574
2042	60.141
2043	59.695
2044	59.247
2045	58.808
2046	58.574
2047	58.304
2048	58.003
2049	57.673
2050	57.317
2051	57.098
2052	56.827
2053	56.514
2054	56.173
2055	55.813
2056	55.585
2057	55.313
2058	55.008
2059	54.675
2060	54.326
2061	54.105
2062	53.844
2063	53.557
2064	53.256
2065	52.953
2066	52.789
2067	52.596
2068	52.387
2069	52.173
2070	51.963
2071	51.89
2072	51.796
2073	51.689
2074	51.579
2075	51.472
2076	51.501
2077	51.505
2078	51.489
2079	51.456
2080	51.408
2081	51.47
2082	51.495
2083	51.49
2084	51.461
2085	51.414
2086	51.464
2087	51.477
2088	51.461
2089	51.422
2090	51.368
2091	51.417
2092	51.428
2093	51.412
2094	51.382
2095	51.347
2096	51.422
2097	51.471
2098	51.502
2099	51.519
2100	51.529