Year	Percent
1991	3.05856
1992	9.54833
1993	1.06566
1994	6.1393
1995	5.2109
1996	-1.21195
1997	-4.15772
1998	-1.00303
1999	-3.18282
2000	-16.56783
2001	-10.41972
2002	-5.34779
2003	3.75698
2004	2.25373
2005	2.82742
2006	4.38374
2007	4.81237
2008	4.64533
2009	-6.86969
2010	4.43909
2011	10.71529
2012	2.29625
2013	0.82738
2014	0.11964
2015	0.45154
2016	1.39634
2017	1.22479