Year	Percent
1991	-1.24846
1992	-9.79468
1993	-7.80756
1994	-11.5964
1995	-10.10995
1996	3.14402
1997	11.87349
1998	8.91675
1999	3.83582
2000	6.29964
2001	5.26389
2002	5.71608
2003	7.79492
2004	12.21262
2005	10.14977
2006	10.67559
2007	9.09946
2008	10.58131
2009	0.42365
2010	7.97749
2011	5.73769
2012	1.82466
2013	1.00796
2014	1.63168
2015	-3.98265
2016	-2.64871
2017	2.3536