Year	Percent
1992	1.34738
1993	1.43334
1994	2.48778
1995	2.41055
1996	5.82421
1997	4.54853
1998	4.04488
1999	4.49213
2000	4.37692
2001	4.28603
2002	2.60523
2003	2.63867
2004	2.89358
2005	3.23224
2006	2.71749
2007	2.50898
2008	2.74728
2009	3.4649
2010	6.58529
2011	6.21875
2012	3.48286
2013	3.58082
2014	3.82487
2015	4.69547
2016	4.22225