Year	Percent
1950	1.678
1951	1.68
1952	1.694
1953	1.729
1954	1.776
1955	1.828
1956	1.881
1957	1.929
1958	1.967
1959	1.996
1960	2.02
1961	2.047
1962	2.085
1963	2.141
1964	2.215
1965	2.297
1966	2.375
1967	2.44
1968	2.487
1969	2.515
1970	2.533
1971	2.55
1972	2.574
1973	2.608
1974	2.65
1975	2.693
1976	2.73
1977	2.758
1978	2.779
1979	2.792
1980	2.8
1981	2.806
1982	2.797
1983	2.767
1984	2.717
1985	2.66
1986	2.605
1987	2.563
1988	2.536
1989	2.524
1990	2.519
1991	2.515
1992	2.515
1993	2.527
1994	2.547
1995	2.572
1996	2.594
1997	2.606
1998	2.604
1999	2.588
2000	2.563
2001	2.538
2002	2.512
2003	2.489
2004	2.467
2005	2.445
2006	2.42
2007	2.391
2008	2.354
2009	2.311
2010	2.265
2011	2.219
2012	2.177
2013	2.14
2014	2.108
2015	2.079
2016	2.049
2017	2.02
2018	1.992
2019	1.964
2020	1.937
2021	1.911
2022	1.884
2023	1.858
2024	1.831
2025	1.804
2026	1.778
2027	1.751
2028	1.724
2029	1.697
2030	1.671
2031	1.644
2032	1.617
2033	1.589
2034	1.561
2035	1.533
2036	1.505
2037	1.477
2038	1.449
2039	1.422
2040	1.396
2041	1.369
2042	1.343
2043	1.316
2044	1.289
2045	1.263
2046	1.236
2047	1.211
2048	1.186
2049	1.162
2050	1.138
2051	1.115
2052	1.092
2053	1.069
2054	1.046
2055	1.023
2056	1.001
2057	0.978
2058	0.956
2059	0.934
2060	0.912
2061	0.89
2062	0.868
2063	0.847
2064	0.826
2065	0.805
2066	0.784
2067	0.764
2068	0.743
2069	0.722
2070	0.701
2071	0.68
2072	0.659
2073	0.639
2074	0.619
2075	0.599
2076	0.579
2077	0.56
2078	0.541
2079	0.523
2080	0.506
2081	0.488
2082	0.471
2083	0.454
2084	0.437
2085	0.42
2086	0.404
2087	0.387
2088	0.372
2089	0.357
2090	0.343
2091	0.328
2092	0.314
2093	0.3
2094	0.287
2095	0.273
2096	0.26
2097	0.247
2098	0.234
2099	0.222