Year	Percent
1950	3.001
1951	2.996
1952	2.977
1953	2.946
1954	2.911
1955	2.879
1956	2.857
1957	2.85
1958	2.858
1959	2.881
1960	2.911
1961	2.935
1962	2.94
1963	2.914
1964	2.861
1965	2.797
1966	2.734
1967	2.676
1968	2.62
1969	2.567
1970	2.515
1971	2.465
1972	2.424
1973	2.401
1974	2.392
1975	2.39
1976	2.384
1977	2.376
1978	2.368
1979	2.358
1980	2.347
1981	2.333
1982	2.305
1983	2.254
1984	2.182
1985	2.101
1986	2.021
1987	1.948
1988	1.882
1989	1.824
1990	1.77
1991	1.715
1992	1.668
1993	1.636
1994	1.617
1995	1.605
1996	1.591
1997	1.569
1998	1.532
1999	1.481
2000	1.424
2001	1.368
2002	1.314
2003	1.257
2004	1.201
2005	1.144
2006	1.087
2007	1.038
2008	1.003
2009	0.979
2010	0.963
2011	0.947
2012	0.928
2013	0.902
2014	0.87
2015	0.835
2016	0.801
2017	0.768
2018	0.736
2019	0.705
2020	0.675
2021	0.644
2022	0.614
2023	0.584
2024	0.555
2025	0.527
2026	0.499
2027	0.471
2028	0.444
2029	0.417
2030	0.391
2031	0.366
2032	0.34
2033	0.315
2034	0.291
2035	0.267
2036	0.243
2037	0.22
2038	0.196
2039	0.174
2040	0.151
2041	0.128
2042	0.107
2043	0.086
2044	0.065
2045	0.046
2046	0.026
2047	0.007
2048	-0.013
2049	-0.032
2050	-0.051
2051	-0.07
2052	-0.089
2053	-0.109
2054	-0.128
2055	-0.147
2056	-0.166
2057	-0.186
2058	-0.204
2059	-0.223
2060	-0.241
2061	-0.26
2062	-0.277
2063	-0.295
2064	-0.313
2065	-0.33
2066	-0.346
2067	-0.362
2068	-0.378
2069	-0.393
2070	-0.408
2071	-0.422
2072	-0.436
2073	-0.448
2074	-0.46
2075	-0.47
2076	-0.48
2077	-0.49
2078	-0.498
2079	-0.506
2080	-0.513
2081	-0.52
2082	-0.525
2083	-0.53
2084	-0.533
2085	-0.536
2086	-0.538
2087	-0.539
2088	-0.54
2089	-0.54
2090	-0.539
2091	-0.538
2092	-0.537
2093	-0.535
2094	-0.533
2095	-0.53
2096	-0.528
2097	-0.525
2098	-0.522
2099	-0.519