Year	Number
1950	89.03
1951	88.667
1952	87.317
1953	85.702
1954	84.133
1955	82.601
1956	82.055
1957	81.643
1958	81.139
1959	80.368
1960	79.323
1961	80.066
1962	80.087
1963	79.752
1964	79.529
1965	79.608
1966	80.926
1967	82.302
1968	83.619
1969	84.617
1970	85.179
1971	86.677
1972	87.515
1973	87.881
1974	88.024
1975	88.069
1976	88.791
1977	89.273
1978	89.509
1979	89.459
1980	89.153
1981	89.538
1982	89.471
1983	89.104
1984	88.586
1985	87.945
1986	88.299
1987	88.728
1988	89.082
1989	89.1
1990	88.585
1991	89.367
1992	89.586
1993	89.409
1994	89.331
1995	89.91
1996	90.46
1997	90.925
1998	91.429
1999	91.793
2000	91.816
2001	92.162
2002	92.049
2003	91.588
2004	90.992
2005	90.422
2006	90.104
2007	89.687
2008	89.168
2009	88.505
2010	87.7
2011	87.2
2012	86.502
2013	85.663
2014	84.72
2015	83.656
2016	82.968
2017	82.246
2018	81.459
2019	80.59
2020	79.659
2021	79.035
2022	78.311
2023	77.518
2024	76.687
2025	75.83
2026	75.173
2027	74.462
2028	73.701
2029	72.892
2030	72.043
2031	71.357
2032	70.607
2033	69.806
2034	68.971
2035	68.112
2036	67.398
2037	66.641
2038	65.856
2039	65.058
2040	64.259
2041	63.607
2042	62.933
2043	62.246
2044	61.556
2045	60.87
2046	60.314
2047	59.743
2048	59.17
2049	58.61
2050	58.071
2051	57.671
2052	57.265
2053	56.858
2054	56.454
2055	56.056
2056	55.766
2057	55.458
2058	55.141
2059	54.82
2060	54.501
2061	54.274
2062	54.032
2063	53.776
2064	53.506
2065	53.226
2066	53.026
2067	52.8
2068	52.559
2069	52.315
2070	52.078
2071	51.93
2072	51.769
2073	51.6
2074	51.427
2075	51.256
2076	51.17
2077	51.066
2078	50.951
2079	50.836
2080	50.724
2081	50.702
2082	50.665
2083	50.617
2084	50.562
2085	50.504
2086	50.53
2087	50.535
2088	50.524
2089	50.501
2090	50.469
2091	50.524
2092	50.55
2093	50.556
2094	50.549
2095	50.536
2096	50.603
2097	50.648
2098	50.68
2099	50.703
2100	50.721