Year	Percent
1995	6.81
1996	9.4
1997	6.8
1998	5
1999	4.5
2000	5.08
2001	5.86
2002	6.49
2003	6.96
2004	6.45
2005	6.05
2006	6.72
2007	6.84
2008	6.23
2009	5.42
2010	4.76
2011	5.4
2012	5.54
2013	4.81
2014	4.45
2015	4.74
2016	4.06
2017	3.57