Year	Percent
1950	5.984
1951	5.82
1952	5.571
1953	5.436
1954	5.364
1955	5.314
1956	5.261
1957	5.173
1958	5.033
1959	4.876
1960	4.698
1961	4.541
1962	4.457
1963	4.45
1964	4.518
1965	4.618
1966	4.688
1967	4.724
1968	4.729
1969	4.703
1970	4.658
1971	4.601
1972	4.518
1973	4.389
1974	4.229
1975	4.058
1976	3.896
1977	3.731
1978	3.556
1979	3.384
1980	3.207
1981	3.045
1982	2.924
1983	2.852
1984	2.835
1985	2.838
1986	2.838
1987	2.837
1988	2.841
1989	2.848
1990	2.851
1991	2.85
1992	2.825
1993	2.762
1994	2.668
1995	2.554
1996	2.437
1997	2.328
1998	2.233
1999	2.149
2000	2.075
2001	2.004
2002	1.914
2003	1.792
2004	1.638
2005	1.47
2006	1.312
2007	1.201
2008	1.174
2009	1.225
2010	1.317
2011	1.406
2012	1.463
2013	1.474
2014	1.437
2015	1.377
2016	1.318
2017	1.269
2018	1.226
2019	1.189
2020	1.156
2021	1.12
2022	1.082
2023	1.043
2024	1.004
2025	0.966
2026	0.928
2027	0.891
2028	0.853
2029	0.816
2030	0.78
2031	0.742
2032	0.707
2033	0.672
2034	0.636
2035	0.601
2036	0.568
2037	0.536
2038	0.504
2039	0.473
2040	0.445
2041	0.417
2042	0.388
2043	0.363
2044	0.337
2045	0.311
2046	0.286
2047	0.262
2048	0.237
2049	0.209
2050	0.182
2051	0.156
2052	0.13
2053	0.103
2054	0.077
2055	0.051
2056	0.026
2057	0.001
2058	-0.023
2059	-0.046
2060	-0.069
2061	-0.091
2062	-0.112
2063	-0.131
2064	-0.15
2065	-0.168
2066	-0.184
2067	-0.199
2068	-0.213
2069	-0.225
2070	-0.237
2071	-0.247
2072	-0.256
2073	-0.263
2074	-0.269
2075	-0.274
2076	-0.278
2077	-0.282
2078	-0.284
2079	-0.287
2080	-0.289
2081	-0.29
2082	-0.291
2083	-0.293
2084	-0.294
2085	-0.294
2086	-0.295
2087	-0.297
2088	-0.297
2089	-0.297
2090	-0.299
2091	-0.3
2092	-0.301
2093	-0.303
2094	-0.304
2095	-0.305
2096	-0.306
2097	-0.308
2098	-0.31
2099	-0.311