Year	Percent
1982	4.27053
1983	2.70288
1984	-2.73398
1985	31.78776
1986	-5.27316
1987	-6.11949
1988	3.1055
1989	5.58473
1990	3.27137
1991	19.08429
1992	15.53223
1993	13.37686
1994	2.93108
1995	12.70637
1996	0.23914
1997	0.20666
1998	-0.15015
1999	2.22272
2000	9.46472
2001	-5.75534
2002	-3.62143
2003	12.76798
2004	3.91136
2005	9.87551
2006	11.55235
2007	17.22058
2008	30.31167
2009	24.14642
2010	1.44457
2011	20.06188
2012	33.54141
2013	4.90198
2014	10.98179
2015	10.83654
2016	10.39794
2017	6.32433