Year	Percent
1991	0.969
1992	0.975
1993	1.491
1994	1.644
1995	3.835
1996	1.407
1997	2.587
1998	0.648
1999	0.329
2000	0.944
2001	0.804
2002	0.6459
2003	0.9988
2004	1.2877
2005	0.9759
2006	1.0806
2007	0.9538
2008	0.9968
2009	1.6262
2010	1.6313
2011	1.4935
2012	1.848
2013	1.4819
2014	1.4095
2015	1.4246
2016	1.2247
2017	1.1969