Year	Percent
1961	5.27073
1962	-1.57715
1963	-3.62395
1964	0.29626
1965	10.94994
1966	10.54043
1967	4.6667
1968	-4.36106
1969	3.19568
1970	-2.12415
1971	13.1469
1972	3.36971
1973	-0.51085
1974	4.16861
1975	3.0481
1976	1.88137
1977	1.69588
1978	6.3562
1979	1.26606
1980	-2.47277
1981	-7.75216
1982	0.02351
1983	0.96425
1984	1.7764
1985	0.00048
1986	-5.63505
1987	-4.56717
1988	-2.99693
1989	-3.756
1990	1.85232
1991	6.43409
1992	-8.17647
1993	9.39793
1994	-10.61691
1995	15.40814
1996	5.18622
1997	1.07238
1998	0.76151
1999	-0.12625
2000	-1.38666
2001	-7.57235
2002	-0.99069
2003	2.93825
2004	2.59828
2005	0.3886
2006	1.6629
2007	6.33989
2008	4.39449
2009	5.06406
2010	3.6856
2011	1.76416
2012	-1.08702
2013	2.15488
2014	2.65517
2015	-0.15274
2016	-0.45011
2017	1.03715