Year	Percent
1996	3.15
1997	3.62
1998	6.41
2000	1.5628
2001	1.4856
2003	3.902
2004	2.0101
2005	1.0166
2006	1.3984
2007	1.2094
2008	1.102
2009	0.9235
2010	0.9517
2011	0.5456
2012	0.5223
2013	0.5033
2014	0.6903
2015	0.5414
2016	1.4106
2017	0.9139