Year	Percent
1950	1.607
1951	1.527
1952	1.412
1953	1.374
1954	1.382
1955	1.411
1956	1.435
1957	1.431
1958	1.386
1959	1.299
1960	1.188
1961	1.088
1962	1.045
1963	1.098
1964	1.239
1965	1.416
1966	1.576
1967	1.707
1968	1.814
1969	1.886
1970	1.96
1971	2.041
1972	2.025
1973	1.818
1974	1.446
1975	0.979
1976	0.529
1977	0.276
1978	0.361
1979	0.778
1980	1.372
1981	1.948
1982	2.374
1983	2.586
1984	2.589
1985	2.489
1986	2.394
1987	2.338
1988	2.324
1989	2.353
1990	2.401
1991	2.435
1992	2.419
1993	2.332
1994	2.182
1995	2.003
1996	1.839
1997	1.732
1998	1.711
1999	1.773
2000	1.878
2001	1.983
2002	2.074
2003	2.15
2004	2.207
2005	2.256
2006	2.304
2007	2.356
2008	2.413
2009	2.472
2010	2.528
2011	2.576
2012	2.604
2013	2.605
2014	2.58
2015	2.541
2016	2.499
2017	2.46
2018	2.424
2019	2.391
2020	2.36
2021	2.327
2022	2.293
2023	2.259
2024	2.226
2025	2.193
2026	2.161
2027	2.131
2028	2.105
2029	2.081
2030	2.058
2031	2.036
2032	2.015
2033	1.994
2034	1.975
2035	1.957
2036	1.938
2037	1.918
2038	1.898
2039	1.876
2040	1.854
2041	1.831
2042	1.807
2043	1.783
2044	1.757
2045	1.73
2046	1.703
2047	1.675
2048	1.647
2049	1.618
2050	1.589
2051	1.559
2052	1.53
2053	1.501
2054	1.472
2055	1.444
2056	1.416
2057	1.388
2058	1.362
2059	1.337
2060	1.312
2061	1.288
2062	1.264
2063	1.24
2064	1.216
2065	1.193
2066	1.17
2067	1.147
2068	1.125
2069	1.104
2070	1.083
2071	1.062
2072	1.041
2073	1.019
2074	0.997
2075	0.974
2076	0.951
2077	0.929
2078	0.907
2079	0.886
2080	0.865
2081	0.844
2082	0.822
2083	0.801
2084	0.779
2085	0.757
2086	0.735
2087	0.714
2088	0.694
2089	0.673
2090	0.654
2091	0.634
2092	0.615
2093	0.597
2094	0.578
2095	0.56
2096	0.542
2097	0.525
2098	0.509
2099	0.493