Year	Percent
1991	-11.55454
1992	-5.2343
1993	-8.59574
1994	-11.32271
1995	-6.57725
1996	2.03372
1997	3.31958
1998	-0.192
1999	3.6829
2000	10.1305
2001	13.69319
2002	9.79547
2003	8.93293
2004	8.841
2005	8.72921
2006	9.53534
2007	7.66144
2008	2.04906
2009	-1.43377
2010	5.79423
2011	5.87351
2012	3.33406
2013	4.48512
2014	2.67671
2015	-0.26827
2016	-0.32751
2017	2.59552