Year	Percent
1990	-4.95646
1991	-19.22422
1992	-19.50096
1993	-25.63673
1994	-16.67895
1995	-19.58372
1996	-8.92692
1997	-8.81327
1998	-20.61888
1999	-2.32522
2000	7.37899
2001	0.90145
2002	-0.72811
2003	-1.50462
2004	0.91832
2005	5.02035
2006	0.44093
2007	-7.31656
2008	-5.57081
2009	-11.42108
2010	-4.39548
2011	-2.37861
2012	-11.63421
2013	-7.79285
2014	-6.86916
2015	-13.85071
2016	-26.37531