Year	Percent
1995	2.09125
1996	2.13714
1997	5.21673
1998	3.749
1999	3.38029
2000	3.81839
2001	5.0208
2002	5.20392
2003	7.49202
2004	5.40176
2005	7.95652
2006	9.72289
2007	23.66737
2008	46.53005
2009	42.45723
2010	26.60022
2011	22.56797
2012	25.58624
2013	29.75495
2014	29.83102
2015	29.22104
2016	25.48755