Year	Percent
1984	1.5
1992	1.5
1994	1.6
1996	1.6
1998	1.5
2000	1.4
2002	1.7
2004	1.7
2005	1.6
2006	1.8
2008	2
2010	1.9
2012	2
2014	2
2016	2.2