Year	Percent
1950	2.669
1951	2.675
1952	2.694
1953	2.721
1954	2.752
1955	2.78
1956	2.803
1957	2.817
1958	2.82
1959	2.813
1960	2.801
1961	2.791
1962	2.79
1963	2.805
1964	2.835
1965	2.871
1966	2.906
1967	2.934
1968	2.95
1969	2.956
1970	2.956
1971	2.956
1972	2.964
1973	2.982
1974	3.011
1975	3.042
1976	3.068
1977	3.085
1978	3.091
1979	3.086
1980	3.075
1981	3.063
1982	3.048
1983	3.029
1984	3.006
1985	2.981
1986	2.955
1987	2.93
1988	2.912
1989	2.897
1990	2.884
1991	2.868
1992	2.847
1993	2.823
1994	2.794
1995	2.761
1996	2.725
1997	2.689
1998	2.651
1999	2.613
2000	2.574
2001	2.532
2002	2.483
2003	2.425
2004	2.358
2005	2.288
2006	2.219
2007	2.149
2008	2.078
2009	2.005
2010	1.932
2011	1.862
2012	1.8
2013	1.753
2014	1.72
2015	1.694
2016	1.669
2017	1.642
2018	1.612
2019	1.579
2020	1.544
2021	1.51
2022	1.477
2023	1.443
2024	1.408
2025	1.372
2026	1.337
2027	1.301
2028	1.265
2029	1.228
2030	1.192
2031	1.156
2032	1.119
2033	1.084
2034	1.048
2035	1.013
2036	0.979
2037	0.945
2038	0.913
2039	0.883
2040	0.853
2041	0.824
2042	0.796
2043	0.767
2044	0.738
2045	0.71
2046	0.681
2047	0.654
2048	0.627
2049	0.6
2050	0.575
2051	0.549
2052	0.523
2053	0.498
2054	0.473
2055	0.447
2056	0.422
2057	0.398
2058	0.373
2059	0.349
2060	0.325
2061	0.301
2062	0.278
2063	0.253
2064	0.229
2065	0.204
2066	0.18
2067	0.156
2068	0.132
2069	0.109
2070	0.086
2071	0.064
2072	0.042
2073	0.021
2074	0
2075	-0.021
2076	-0.041
2077	-0.06
2078	-0.079
2079	-0.097
2080	-0.115
2081	-0.132
2082	-0.148
2083	-0.164
2084	-0.179
2085	-0.194
2086	-0.208
2087	-0.221
2088	-0.234
2089	-0.246
2090	-0.258
2091	-0.268
2092	-0.278
2093	-0.288
2094	-0.296
2095	-0.304
2096	-0.312
2097	-0.318
2098	-0.324
2099	-0.328