Year	Percent
1995	2.79726
1996	1.92023
1997	5.99491
1998	4.46295
1999	7.64787
2000	2.86782
2001	3.26176
2002	2.4006
2003	3.81238
2004	13.20956
2005	11.55255
2006	14.1789
2007	12.71922
2008	11.85988
2009	8.22725
2010	2.17158
2011	15.08147
2012	8.52317
2013	1.34431
2014	3.72122
2015	4.78735