Year	Percent
1950	0.688
1951	0.994
1952	1.502
1953	1.842
1954	2.067
1955	2.197
1956	2.281
1957	2.355
1958	2.43
1959	2.531
1960	2.646
1961	2.734
1962	2.756
1963	2.704
1964	2.587
1965	2.423
1966	2.269
1967	2.217
1968	2.323
1969	2.574
1970	2.9
1971	3.209
1972	3.405
1973	3.426
1974	3.303
1975	3.105
1976	2.922
1977	2.842
1978	2.902
1979	3.09
1980	3.326
1981	3.527
1982	3.652
1983	3.683
1984	3.63
1985	3.535
1986	3.435
1987	3.331
1988	3.211
1989	3.079
1990	2.949
1991	2.825
1992	2.691
1993	2.527
1994	2.341
1995	2.146
1996	1.967
1997	1.869
1998	1.895
1999	2.034
2000	2.234
2001	2.429
2002	2.577
2003	2.66
2004	2.678
2005	2.658
2006	2.632
2007	2.63
2008	2.67
2009	2.743
2010	2.828
2011	2.89
2012	2.883
2013	2.775
2014	2.575
2015	2.334
2016	2.098
2017	1.893
2018	1.735
2019	1.622
2020	1.531
2021	1.442
2022	1.348
2023	1.252
2024	1.155
2025	1.061
2026	0.975
2027	0.9
2028	0.841
2029	0.796
2030	0.761
2031	0.731
2032	0.704
2033	0.684
2034	0.668
2035	0.654
2036	0.644
2037	0.636
2038	0.628
2039	0.62
2040	0.612
2041	0.604
2042	0.593
2043	0.578
2044	0.559
2045	0.537
2046	0.513
2047	0.486
2048	0.456
2049	0.419
2050	0.381
2051	0.341
2052	0.3
2053	0.26
2054	0.217
2055	0.175
2056	0.132
2057	0.089
2058	0.049
2059	0.011
2060	-0.028
2061	-0.064
2062	-0.099
2063	-0.134
2064	-0.166
2065	-0.194
2066	-0.223
2067	-0.252
2068	-0.279
2069	-0.305
2070	-0.331
2071	-0.356
2072	-0.38
2073	-0.404
2074	-0.427
2075	-0.451
2076	-0.471
2077	-0.491
2078	-0.511
2079	-0.528
2080	-0.544
2081	-0.558
2082	-0.569
2083	-0.575
2084	-0.577
2085	-0.577
2086	-0.576
2087	-0.571
2088	-0.562
2089	-0.55
2090	-0.535
2091	-0.52
2092	-0.504
2093	-0.489
2094	-0.474
2095	-0.462
2096	-0.451
2097	-0.439
2098	-0.43
2099	-0.421