Year	Percent
1984	8
1992	8.1
1994	8
1996	8.6
1998	8.4
2000	7.9
2002	8.4
2004	8.8
2005	8.6
2006	8.8
2008	9.6
2010	9.4
2012	9.3
2014	9.4
2016	9.8