Year	Percent
1950	2.141
1951	2.151
1952	2.146
1953	2.096
1954	2.012
1955	1.908
1956	1.795
1957	1.681
1958	1.574
1959	1.477
1960	1.388
1961	1.3
1962	1.206
1963	1.097
1964	0.978
1965	0.853
1966	0.737
1967	0.659
1968	0.643
1969	0.688
1970	0.764
1971	0.841
1972	0.907
1973	0.958
1974	0.991
1975	1.016
1976	1.041
1977	1.045
1978	1.013
1979	0.945
1980	0.856
1981	0.766
1982	0.687
1983	0.625
1984	0.582
1985	0.548
1986	0.512
1987	0.476
1988	0.447
1989	0.422
1990	0.401
1991	0.382
1992	0.356
1993	0.317
1994	0.264
1995	0.204
1996	0.146
1997	0.097
1998	0.06
1999	0.037
2000	0.021
2001	0.009
2002	-0.001
2003	-0.007
2004	-0.009
2005	-0.008
2006	-0.006
2007	0.003
2008	0.022
2009	0.05
2010	0.084
2011	0.118
2012	0.141
2013	0.145
2014	0.131
2015	0.105
2016	0.077
2017	0.051
2018	0.031
2019	0.015
2020	0
2021	-0.016
2022	-0.036
2023	-0.059
2024	-0.085
2025	-0.114
2026	-0.142
2027	-0.171
2028	-0.201
2029	-0.23
2030	-0.26
2031	-0.289
2032	-0.316
2033	-0.34
2034	-0.36
2035	-0.378
2036	-0.394
2037	-0.409
2038	-0.42
2039	-0.428
2040	-0.434
2041	-0.438
2042	-0.442
2043	-0.445
2044	-0.447
2045	-0.449
2046	-0.451
2047	-0.453
2048	-0.456
2049	-0.46
2050	-0.465
2051	-0.47
2052	-0.476
2053	-0.484
2054	-0.494
2055	-0.505
2056	-0.516
2057	-0.528
2058	-0.541
2059	-0.556
2060	-0.572
2061	-0.587
2062	-0.601
2063	-0.614
2064	-0.626
2065	-0.637
2066	-0.647
2067	-0.654
2068	-0.659
2069	-0.661
2070	-0.66
2071	-0.658
2072	-0.653
2073	-0.645
2074	-0.635
2075	-0.622
2076	-0.608
2077	-0.592
2078	-0.576
2079	-0.558
2080	-0.54
2081	-0.521
2082	-0.502
2083	-0.485
2084	-0.469
2085	-0.453
2086	-0.439
2087	-0.425
2088	-0.413
2089	-0.403
2090	-0.395
2091	-0.387
2092	-0.381
2093	-0.376
2094	-0.371
2095	-0.368
2096	-0.365
2097	-0.365
2098	-0.366
2099	-0.369