Year	Percent
1996	12.60244
1997	5.80971
1998	4.80426
1999	1.49611
2000	3.61548
2001	2.2928
2002	5.09436
2003	4.91678
2004	6.76221
2005	11.1737
2006	12.40971
2007	20.11601
2008	11.75146
2009	-9.67966
2010	-0.81184
2011	6.39465
2012	3.61573
2013	1.64688
2014	1.75848
2015	0.00123
2016	0.27397
2017	3.0585