Year	Percent
1971	1.02674
1972	1.02186
1973	1.03202
1974	1.03265
1975	1.03985
1976	1.03755
1977	1.03976
1978	1.04525
1979	1.04722
1980	1.05424
1981	1.05251
1982	1.0522
1983	1.04791
1984	1.04574
1985	1.0455
1986	1.04786
1987	1.04618
1988	1.04401
1989	1.04545
1990	1.04882
1991	1.04656
1992	1.04237
1993	1.02021
1994	1.02384
1995	1.03014
1996	1.03865
1997	1.04275
1998	1.0235
1999	1.02309
2000	1.02985
2001	1.03269
2002	1.03517
2003	1.03223
2004	1.02909
2005	1.03454
2006	1.02663
2007	1.02478
2008	1.02607
2009	1.02464
2010	1.02076
2011	1.01166
2012	1.01067
2014	1.00783
2015	1.00973
2016	1.00979