Year	Percent
1990	0.59769
1991	0.66712
1992	1.05244
1993	1.12673
1994	1.20511
1999	3.23908
2000	3.08632
2001	2.17126
2002	0.5567
2003	0.6848
2004	1.52916
2005	2.30786
2006	1.49481
2007	2.08435
2008	1.86255
2009	0.94929
2010	1.02595
2011	1.02153
2012	0.91514
2013	0.99228
2014	0.90777
2015	0.83628
2016	0.84303