Year	Percent
1950	2.868
1951	2.85
1952	2.827
1953	2.827
1954	2.844
1955	2.871
1956	2.902
1957	2.933
1958	2.961
1959	2.981
1960	2.995
1961	3.002
1962	3.003
1963	2.999
1964	2.988
1965	2.976
1966	2.959
1967	2.914
1968	2.823
1969	2.691
1970	2.542
1971	2.402
1972	2.296
1973	2.241
1974	2.235
1975	2.252
1976	2.267
1977	2.275
1978	2.28
1979	2.279
1980	2.276
1981	2.272
1982	2.258
1983	2.228
1984	2.183
1985	2.128
1986	2.073
1987	2.02
1988	1.972
1989	1.928
1990	1.886
1991	1.843
1992	1.798
1993	1.748
1994	1.693
1995	1.637
1996	1.582
1997	1.533
1998	1.496
1999	1.469
2000	1.448
2001	1.426
2002	1.399
2003	1.366
2004	1.327
2005	1.284
2006	1.242
2007	1.201
2008	1.16
2009	1.119
2010	1.079
2011	1.038
2012	0.999
2013	0.962
2014	0.927
2015	0.893
2016	0.86
2017	0.827
2018	0.793
2019	0.758
2020	0.723
2021	0.689
2022	0.656
2023	0.623
2024	0.592
2025	0.562
2026	0.532
2027	0.502
2028	0.473
2029	0.443
2030	0.414
2031	0.386
2032	0.357
2033	0.329
2034	0.301
2035	0.274
2036	0.246
2037	0.219
2038	0.193
2039	0.167
2040	0.142
2041	0.117
2042	0.092
2043	0.068
2044	0.043
2045	0.019
2046	-0.004
2047	-0.027
2048	-0.048
2049	-0.069
2050	-0.089
2051	-0.109
2052	-0.128
2053	-0.146
2054	-0.164
2055	-0.181
2056	-0.197
2057	-0.213
2058	-0.228
2059	-0.243
2060	-0.258
2061	-0.272
2062	-0.286
2063	-0.299
2064	-0.313
2065	-0.325
2066	-0.338
2067	-0.35
2068	-0.363
2069	-0.375
2070	-0.388
2071	-0.4
2072	-0.411
2073	-0.423
2074	-0.435
2075	-0.447
2076	-0.458
2077	-0.469
2078	-0.478
2079	-0.486
2080	-0.494
2081	-0.5
2082	-0.506
2083	-0.512
2084	-0.516
2085	-0.52
2086	-0.524
2087	-0.527
2088	-0.529
2089	-0.531
2090	-0.532
2091	-0.533
2092	-0.534
2093	-0.534
2094	-0.533
2095	-0.532
2096	-0.531
2097	-0.529
2098	-0.527
2099	-0.525