Year	Percent
1961	0.32559
1962	0.31609
1963	0.27226
1964	5.76904
1965	-2.88268
1966	5.1507
1967	-3.37138
1968	-1.2224
1969	2.44539
1970	0.55442
1971	-3.17925
1972	1.00865
1973	-2.54676
1974	4.08755
1975	-0.71651
1976	2.13525
1977	0.75968
1978	2.09538
1979	0.08288
1980	-4.51834
1981	5.87768
1982	1.39737
1983	-5.20754
1984	7.1797
1985	3.75395
1986	2.25937
1987	-0.51379
1988	5.33034
1989	1.93522
1990	2.09083
1991	3.62868
1992	1.32277
1993	1.05239
1994	5.3847
1995	0.90909
1996	2.89026
1997	2.76641
1998	0.9138
1999	2.39793
2000	4.25449
2001	2.97429
2002	-1.52854
2003	2.34411
2004	3.19846
2005	2.14398
2006	2.1679
2007	2.32979
2008	5.05861
2009	3.49622
2010	3.72247
2011	2.27128
2012	3.558
2013	2.88096
2014	4.72441
2015	2.12209
2016	-0.71825
2017	6.31738