Year	Number
1950	80.04
1951	81.063
1952	81.574
1953	82.322
1954	83.524
1955	85.151
1956	87.223
1957	89.748
1958	92.313
1959	94.429
1960	95.942
1961	97.842
1962	99.008
1963	99.505
1964	99.543
1965	99.207
1966	98.998
1967	98.273
1968	97.075
1969	95.435
1970	93.428
1971	91.194
1972	88.842
1973	86.426
1974	84.015
1975	81.722
1976	79.659
1977	78.087
1978	76.873
1979	75.803
1980	74.74
1981	75.311
1982	75.228
1983	74.779
1984	74.569
1985	74.947
1986	74.666
1987	75.244
1988	76.295
1989	77.197
1990	77.648
1991	79.083
1992	80.002
1993	80.394
1994	80.477
1995	80.446
1996	80.079
1997	79.685
1998	79.051
1999	77.919
2000	76.316
2001	75.389
2002	73.458
2003	71.065
2004	69.088
2005	67.969
2006	66.01
2007	65.74
2008	66.225
2009	66.31
2010	65.575
2011	65.872
2012	65.098
2013	63.845
2014	63.029
2015	63
2016	62.912
2017	63.621
2018	64.731
2019	65.597
2020	65.891
2021	66.008
2022	65.66
2023	65.005
2024	64.323
2025	63.777
2026	63.34
2027	62.927
2028	62.54
2029	62.135
2030	61.704
2031	61.279
2032	60.864
2033	60.423
2034	59.92
2035	59.347
2036	58.747
2037	58.123
2038	57.508
2039	56.953
2040	56.485
2041	56.2
2042	55.969
2043	55.801
2044	55.707
2045	55.681
2046	55.798
2047	55.938
2048	56.102
2049	56.295
2050	56.509
2051	56.77
2052	57.044
2053	57.284
2054	57.433
2055	57.458
2056	57.425
2057	57.262
2058	57.023
2059	56.772
2060	56.556
2061	56.402
2062	56.285
2063	56.145
2064	55.904
2065	55.523
2066	55.075
2067	54.511
2068	53.931
2069	53.463
2070	53.176
2071	53.113
2072	53.194
2073	53.376
2074	53.601
2075	53.821
2076	54.115
2077	54.399
2078	54.679
2079	54.959
2080	55.237
2081	55.559
2082	55.854
2083	56.122
2084	56.358
2085	56.556
2086	56.744
2087	56.891
2088	56.998
2089	57.061
2090	57.081
2091	57.078
2092	57.037
2093	56.962
2094	56.861
2095	56.746
2096	56.653
2097	56.542
2098	56.433
2099	56.358
2100	56.33