Year	Percent
1990	-8.27834
1991	-2.49329
1992	-3.25509
1993	-4.52533
1994	5.17672
1995	2.13153
1996	-10.64972
1997	-9.40615
1998	-10.60785
1999	-4.39943
2000	-2.56799
2001	-8.02607
2002	-7.23135
2003	-1.8973
2004	-2.73687
2005	-4.58814
2006	-3.97782
2007	-1.11933
2008	-2.83026
2009	-1.48302
2010	-1.45254
2011	-0.91381
2012	3.66637
2013	4.23354
2014	3.42711
2015	1.60727
2016	3.50211
2017	3.42648