Year	Percent
1991	-6.03303
1992	-6.34705
1993	-7.25329
1994	-1.64291
1995	-1.19196
1996	0.87022
1997	0.92477
1998	2.73865
1999	3.70317
2000	4.0135
2001	-3.44794
2002	1.19256
2003	1.99831
2004	4.49017
2005	4.55945
2006	4.99062
2007	6.35425
2008	5.37376
2009	-0.44121
2010	3.2766
2011	2.25871
2012	-0.53552
2013	2.84082
2014	3.54205
2015	3.75108
2016	2.82963
2017	-0.07362