Year	Percent
2001	1.08362
2002	3.9305
2003	1.88828
2004	1.43802
2005	1.83675
2006	0.76577
2007	2.10354
2008	1.54369
2009	3.03369
2010	3.50704
2011	3.73095
2012	4.54055
2013	4.28678
2014	3.32131
2015	1.3247
2016	-1.32055
2017	3.85821