Year	Percent
1992	2.51495
1993	2.67535
1994	2.29731
1995	1.73979
1996	1.62558
1997	1.31332
1998	1.10002
1999	1.05295
2000	0.90647
2001	0.84212
2002	0.75098
2003	1.15586
2004	1.2527
2005	1.02837
2006	0.71596
2007	0.58492
2008	0.40396
2009	0.82157
2010	1.52079
2011	1.67052
2012	1.74492
2013	1.50327
2014	1.3789
2015	1.35597
2016	1.25274
2017	1.13964