Year	Percent
1990	0.06593
1991	0.12694
1992	0.66642
1993	0.68922
1994	0.45785
1995	-1.42297
1996	-0.09923
1997	-0.27991
1998	-0.37926
1999	-0.36198
2000	-0.31952
2001	-0.17195
2002	-0.09215
2003	-0.21274
2004	-0.23333
2005	-0.30043
2006	-0.3932
2007	-0.40546
2008	-0.42571
2009	-0.40099
2010	-0.40201
2011	-0.78947
2012	-0.4853
2013	-0.48659
2014	-0.46949
2015	-0.49477
2016	-0.52369
2017	-0.51211