Year	Percent
1996	4.1667
1997	5.0279
1998	5.814
1999	7.1856
2000	7.3826
2001	6.25
2002	7.3333
2003	7.1429
2004	7.483
2005	5.814
2006	5.8201
2007	4.1475
2008	4.3478
2009	5.88
2010	3.47
2011	4.74
2012	4.48
2013	3.03
2014	4.49
2015	3.85
2016	3.6232
2017	3.9146