Year	Percent
1992	1.02501
1993	1.02225
1994	1.05049
1995	1.04414
1996	1.03699
1998	1.0166
1999	1.01863
2000	1.02329
2001	1.01794
2002	1.01774
2003	1.0235
2004	1.0171
2005	1.01028
2006	1.01449
2007	1.0146
2008	1.01303
2009	1.00529
2010	0.9938
2011	0.99148
2012	0.99267
2013	0.99308
2014	0.99526
2015	0.99887