Year	Percent
1960	5.84935
1961	7.33684
1962	6.62657
1963	2.66548
1964	3.42394
1965	4.0804
1966	5.29827
1967	4.4224
1968	4.7083
1969	6.18668
1970	3.89637
1971	4.79073
1972	4.61298
1973	2.44057
1974	2.52609
1975	4.51801
1976	2.5888
1977	2.24713
1978	1.82505
1979	2.03127
1980	1.80532
1981	1.63142
1982	1.34696
1983	1.53899
1984	2.85333
1985	2.63562
1986	2.64416
1987	4.87423
1988	1.09677
1989	1.185
1990	3.27477
1991	1.55023
1992	0.96754
1993	0.35865
1994	0.21407
1995	0.27576
1996	-1.09146
1997	-0.55925
1998	1.04796
1999	0.82377
2000	0.19306
2001	0.12956
2002	0.35755
2003	0.43977
2004	1.04065
2005	0.0909
2006	0.65344
2007	0.44616
2008	0.31568
2009	0.38787
2010	-0.0103
2011	0.05907
2012	0.02263
2013	-0.13514
2014	0.02359
2015	-0.00078
2016	-0.06617
2017	-0.03588
2018	-0.0402
2019	-0.00381
2020	-0.00782
2021	0.01739