Year	Percent
1992	3.82813
1993	9.58796
1994	0.15224
1995	0.67259
1996	0.9105
1997	0.87297
1998	0.94528
1999	1.13505
2000	0.66236
2001	0.85785
2002	0.84253
2003	0.94727
2004	0.79843
2005	0.72559
2006	0.57251
2007	0.57116
2008	0.81403
2009	0.98525
2010	1.0904
2011	4.10732
2012	6.15534
2013	6.11919
2014	5.81974
2015	6.05113
2016	5.95502