Year	Percent
1983	4
1984	2.68
1993	1.78
1994	0.38
1995	1.19
1996	9.085
1997	1.807
1998	3.084
1999	1.035
2000	5.158
2001	2.07
2002	2.667
2003	2.183
2004	6.641
2005	6.066
2006	6.555
2007	5.923
2008	11.159
2009	9.053
2010	1.8902
2011	2.1372
2012	2.3284
2013	1.7098
2014	2.3806
2015	3.0628
2016	2.2218
2017	2.333