Year	Percent
1996	4.6154
1997	3.125
1998	6.0606
1999	4.4118
2000	5.9701
2001	5.1282
2002	6.6667
2003	5.8824
2004	4.3103
2005	4.5455
2006	2.5806
2007	4.0698
2008	3.1088
2009	5.29
2010	4.29
2011	2.93
2012	1.92
2013	2.53
2014	1.9
2015	1.92
2016	2.3569
2017	3.1051