Year	Percent
1950	2.588
1951	2.595
1952	2.612
1953	2.636
1954	2.664
1955	2.695
1956	2.727
1957	2.758
1958	2.787
1959	2.814
1960	2.837
1961	2.857
1962	2.876
1963	2.892
1964	2.905
1965	2.916
1966	2.922
1967	2.921
1968	2.912
1969	2.895
1970	2.873
1971	2.85
1972	2.824
1973	2.794
1974	2.762
1975	2.728
1976	2.694
1977	2.662
1978	2.631
1979	2.602
1980	2.574
1981	2.545
1982	2.52
1983	2.503
1984	2.492
1985	2.482
1986	2.47
1987	2.453
1988	2.43
1989	2.4
1990	2.367
1991	2.331
1992	2.29
1993	2.241
1994	2.186
1995	2.129
1996	2.073
1997	2.015
1998	1.948
1999	1.875
2000	1.798
2001	1.726
2002	1.671
2003	1.646
2004	1.649
2005	1.666
2006	1.683
2007	1.69
2008	1.681
2009	1.658
2010	1.628
2011	1.598
2012	1.57
2013	1.544
2014	1.518
2015	1.493
2016	1.466
2017	1.439
2018	1.41
2019	1.381
2020	1.351
2021	1.321
2022	1.291
2023	1.262
2024	1.233
2025	1.203
2026	1.175
2027	1.146
2028	1.118
2029	1.091
2030	1.064
2031	1.037
2032	1.01
2033	0.983
2034	0.957
2035	0.93
2036	0.903
2037	0.877
2038	0.851
2039	0.825
2040	0.8
2041	0.775
2042	0.75
2043	0.726
2044	0.701
2045	0.677
2046	0.653
2047	0.63
2048	0.607
2049	0.585
2050	0.563
2051	0.541
2052	0.519
2053	0.498
2054	0.477
2055	0.456
2056	0.435
2057	0.415
2058	0.394
2059	0.374
2060	0.354
2061	0.334
2062	0.314
2063	0.295
2064	0.276
2065	0.257
2066	0.239
2067	0.22
2068	0.202
2069	0.184
2070	0.166
2071	0.149
2072	0.131
2073	0.115
2074	0.098
2075	0.082
2076	0.067
2077	0.051
2078	0.036
2079	0.02
2080	0.005
2081	-0.01
2082	-0.024
2083	-0.037
2084	-0.05
2085	-0.063
2086	-0.075
2087	-0.086
2088	-0.098
2089	-0.108
2090	-0.118
2091	-0.128
2092	-0.138
2093	-0.147
2094	-0.157
2095	-0.166
2096	-0.175
2097	-0.184
2098	-0.193
2099	-0.201