Year	Percent
1992	4.082
1993	2.675
1994	2.493
1995	1.727
1996	1.808
1997	1.9843
1998	2.2198
1999	2.2252
2000	4.5569
2001	1.5536
2002	1.5647
2003	2.0843
2005	2.7466
2006	1.4434
2007	1.7577
2008	1.5949
2010	1.4496
2011	1.3959
2012	1.9575
2013	1.9574
2014	2.0024
2015	1.4353
2016	1.48
2017	1.181