Year	Percent
1998	1.04346
1999	1.04742
2000	1.04013
2002	1.071
2004	1.02679
2005	1.03697
2007	1.0362
2008	1.02969
2009	0.96556
2010	0.9735
2011	0.99024
2012	0.98801
2013	0.98961
2014	0.98701
2015	0.98683
2016	0.99181