Year	Percent
1950	1.283
1951	1.583
1952	2.134
1953	2.582
1954	2.925
1955	3.162
1956	3.298
1957	3.338
1958	3.294
1959	3.18
1960	3.02
1961	2.841
1962	2.674
1963	2.541
1964	2.444
1965	2.36
1966	2.27
1967	2.184
1968	2.117
1969	2.066
1970	2.028
1971	1.992
1972	1.941
1973	1.862
1974	1.757
1975	1.639
1976	1.524
1977	1.438
1978	1.399
1979	1.403
1980	1.432
1981	1.462
1982	1.462
1983	1.41
1984	1.312
1985	1.188
1986	1.069
1987	0.986
1988	0.956
1989	0.979
1990	1.028
1991	1.072
1992	1.097
1993	1.097
1994	1.069
1995	1.028
1996	0.988
1997	0.942
1998	0.881
1999	0.807
2000	0.727
2001	0.648
2002	0.575
2003	0.511
2004	0.457
2005	0.408
2006	0.362
2007	0.329
2008	0.322
2009	0.338
2010	0.369
2011	0.401
2012	0.425
2013	0.432
2014	0.421
2015	0.402
2016	0.383
2017	0.365
2018	0.349
2019	0.334
2020	0.318
2021	0.3
2022	0.282
2023	0.265
2024	0.25
2025	0.234
2026	0.217
2027	0.198
2028	0.175
2029	0.149
2030	0.12
2031	0.091
2032	0.059
2033	0.024
2034	-0.014
2035	-0.054
2036	-0.094
2037	-0.134
2038	-0.171
2039	-0.206
2040	-0.239
2041	-0.272
2042	-0.303
2043	-0.333
2044	-0.36
2045	-0.386
2046	-0.41
2047	-0.433
2048	-0.455
2049	-0.475
2050	-0.494
2051	-0.511
2052	-0.527
2053	-0.541
2054	-0.553
2055	-0.564
2056	-0.573
2057	-0.581
2058	-0.587
2059	-0.591
2060	-0.594
2061	-0.595
2062	-0.597
2063	-0.599
2064	-0.601
2065	-0.604
2066	-0.607
2067	-0.608
2068	-0.61
2069	-0.613
2070	-0.615
2071	-0.616
2072	-0.616
2073	-0.615
2074	-0.612
2075	-0.607
2076	-0.602
2077	-0.596
2078	-0.589
2079	-0.583
2080	-0.576
2081	-0.568
2082	-0.559
2083	-0.547
2084	-0.532
2085	-0.516
2086	-0.5
2087	-0.483
2088	-0.469
2089	-0.456
2090	-0.445
2091	-0.433
2092	-0.42
2093	-0.405
2094	-0.389
2095	-0.373
2096	-0.356
2097	-0.34
2098	-0.324
2099	-0.31