Year	Percent
1950	1.051
1951	1.69
1952	2.771
1953	3.498
1954	3.929
1955	4.12
1956	4.137
1957	4.038
1958	3.867
1959	3.653
1960	3.425
1961	3.195
1962	2.962
1963	2.737
1964	2.542
1965	2.374
1966	2.251
1967	2.261
1968	2.482
1969	2.893
1970	3.348
1971	3.748
1972	4.181
1973	4.734
1974	5.343
1975	5.951
1976	6.439
1977	6.551
1978	6.142
1979	5.334
1980	4.372
1981	3.496
1982	2.899
1983	2.683
1984	2.817
1985	3.124
1986	3.403
1987	3.531
1988	3.455
1989	3.198
1990	2.895
1991	2.666
1992	2.529
1993	2.471
1994	2.499
1995	2.578
1996	2.696
1997	2.939
1998	3.381
1999	3.985
2000	4.576
2001	5.043
2002	5.503
2003	6.059
2004	6.632
2005	7.202
2006	7.637
2007	7.548
2008	6.725
2009	5.366
2010	3.787
2011	2.336
2012	1.432
2013	1.372
2014	2.101
2015	3.216
2016	4.217
2017	4.743
2018	4.645
2019	4.008
2020	3.147
2021	2.368
2022	1.806
2023	1.508
2024	1.47
2025	1.557
2026	1.625
2027	1.631
2028	1.575
2029	1.455
2030	1.311
2031	1.183
2032	1.08
2033	0.996
2034	0.934
2035	0.883
2036	0.834
2037	0.787
2038	0.746
2039	0.707
2040	0.674
2041	0.643
2042	0.614
2043	0.586
2044	0.559
2045	0.533
2046	0.509
2047	0.486
2048	0.463
2049	0.441
2050	0.42
2051	0.399
2052	0.379
2053	0.361
2054	0.343
2055	0.326
2056	0.31
2057	0.293
2058	0.276
2059	0.258
2060	0.241
2061	0.223
2062	0.205
2063	0.186
2064	0.168
2065	0.149
2066	0.13
2067	0.11
2068	0.09
2069	0.069
2070	0.048
2071	0.027
2072	0.006
2073	-0.016
2074	-0.039
2075	-0.062
2076	-0.085
2077	-0.109
2078	-0.132
2079	-0.156
2080	-0.179
2081	-0.203
2082	-0.226
2083	-0.25
2084	-0.274
2085	-0.297
2086	-0.32
2087	-0.343
2088	-0.364
2089	-0.384
2090	-0.404
2091	-0.422
2092	-0.438
2093	-0.453
2094	-0.467
2095	-0.478
2096	-0.488
2097	-0.495
2098	-0.5
2099	-0.502