Year	Percent
1994	3.1617
1995	3.78789
1996	10.18763
1997	27.38767
1998	3.07826
1999	4.47004
2000	3.07798
2001	2.59304
2002	3.98086
2003	3.32606
2004	2.68078
2005	3.95673
2006	4.77895
2007	5.12167
2008	4.24243
2009	4.59038
2010	8.25989
2011	6.30872
2012	4.78458
2013	2.36113
2014	4.80677
2015	3.98893
2016	3.10324