Year	Percent
1998	4.3
2000	8.6
2001	8.8
2002	8.6
2003	9.3
2004	7.7
2005	8.4
2006	7.3
2007	7.6
2008	8.4
2009	9.1
2010	8.7
2011	9.7
2012	9.6
2013	9.3
2014	10
2015	9.5
2016	10