Year	Percent
1989	1.02805
1990	1.03513
1991	1.03883
1994	1.02104
1998	1.02721
1999	1.02326
2000	1.00471
2001	1.01192
2002	1.00747
2003	1.00386
2004	1.00364
2005	1.00251
2006	1.00143
2007	1.00067
2008	0.99756
2009	0.99888
2010	0.99836
2011	0.9958
2012	0.99561
2014	1.01261
2015	0.95169