Year	Percent
1950	1.147
1951	1.238
1952	1.413
1953	1.57
1954	1.712
1955	1.839
1956	1.955
1957	2.061
1958	2.159
1959	2.248
1960	2.33
1961	2.403
1962	2.466
1963	2.517
1964	2.558
1965	2.595
1966	2.63
1967	2.66
1968	2.681
1969	2.695
1970	2.706
1971	2.72
1972	2.748
1973	2.8
1974	2.872
1975	2.95
1976	3.02
1977	3.087
1978	3.155
1979	3.223
1980	3.284
1981	3.331
1982	3.355
1983	3.35
1984	3.318
1985	3.273
1986	3.222
1987	3.158
1988	3.071
1989	2.967
1990	2.853
1991	2.741
1992	2.647
1993	2.58
1994	2.538
1995	2.511
1996	2.485
1997	2.446
1998	2.389
1999	2.316
2000	2.237
2001	2.165
2002	2.109
2003	2.074
2004	2.058
2005	2.051
2006	2.044
2007	2.043
2008	2.052
2009	2.07
2010	2.091
2011	2.11
2012	2.116
2013	2.101
2014	2.067
2015	2.022
2016	1.976
2017	1.932
2018	1.888
2019	1.845
2020	1.803
2021	1.759
2022	1.715
2023	1.671
2024	1.627
2025	1.583
2026	1.54
2027	1.5
2028	1.464
2029	1.432
2030	1.402
2031	1.372
2032	1.345
2033	1.32
2034	1.297
2035	1.275
2036	1.253
2037	1.231
2038	1.208
2039	1.183
2040	1.157
2041	1.131
2042	1.104
2043	1.074
2044	1.043
2045	1.011
2046	0.979
2047	0.946
2048	0.913
2049	0.879
2050	0.845
2051	0.812
2052	0.779
2053	0.747
2054	0.716
2055	0.686
2056	0.657
2057	0.629
2058	0.601
2059	0.575
2060	0.549
2061	0.524
2062	0.5
2063	0.477
2064	0.455
2065	0.434
2066	0.413
2067	0.392
2068	0.372
2069	0.353
2070	0.333
2071	0.315
2072	0.296
2073	0.277
2074	0.258
2075	0.239
2076	0.22
2077	0.202
2078	0.184
2079	0.166
2080	0.149
2081	0.132
2082	0.116
2083	0.099
2084	0.084
2085	0.068
2086	0.053
2087	0.038
2088	0.023
2089	0.009
2090	-0.006
2091	-0.02
2092	-0.033
2093	-0.046
2094	-0.058
2095	-0.069
2096	-0.08
2097	-0.09
2098	-0.1
2099	-0.109