Year	Percent
1993	2.71282
1994	1.92042
1995	2.62553
1996	2.65565
1997	2.18888
1998	2.10635
1999	2.42939
2000	2.22275
2001	2.19662
2002	3.10778
2003	2.64394
2004	2.92255
2005	2.72133
2006	3.53096
2007	3.41529
2008	4.59392
2009	5.7516
2010	6.59283
2011	6.12216
2012	9.30095
2013	8.66076
2014	7.92979
2015	13.84635
2016	9.70701