Year	Percent
1975	-0.11928
1977	0.03479
1979	0.19403
1984	1.65368
1985	1.001
1986	0.62968
1987	0.06903
1988	0.41348
1989	0.22051
1990	0.828
1991	0.81275
1992	2.57607
1993	1.39311
1994	0.1825
1995	0.01575
1996	0.38089
1997	4.27446
1998	2.13465
1999	0.32563
2000	0.18971
2001	0.10085
2002	0.85634
2003	0.84081
2004	0.36069
2005	1.48134
2006	3.02229
2007	2.69689
2008	0.76679
2009	2.28474
2010	3.08478
2011	2.27618
2012	0.66927
2013	1.87798
2014	2.73872
2015	1.7728
2016	1.20707
2017	1.22893