Year	Percent
1992	0.00162
1993	0.03963
1994	0.24841
1995	0.1845
1996	0.25655
1997	3.35875
1998	3.33413
1999	0.90873
2000	1.63351
2001	4.24476
2002	3.24807
2003	5.39212
2004	5.38042
2005	2.1378
2006	3.56824
2007	1.12647
2008	0.401
2009	0.68273
2010	0.96303
2011	1.96074
2012	0.64317
2013	2.82041
2014	3.33569
2015	4.07436
2016	5.46425
2017	4.45175