Year	Percent
1993	0.96392
1995	1.01789
1996	1.01173
1997	1.00587
1998	0.99811
1999	0.99636
2000	0.99285
2001	0.98986
2002	0.98454
2003	0.98215
2004	0.99098
2005	0.99244
2006	0.99425
2007	0.99397
2008	0.99327
2009	0.99332
2010	0.98309
2011	0.9782
2012	0.97095
2013	0.96657
2014	0.96943
2015	0.97074
2016	0.96744