Year	Percent
1970	1.10615
1971	1.11332
1972	1.0997
1973	1.13155
1974	1.12706
1975	1.1827
1976	1.12397
1978	1.11512
1979	1.08726
1980	1.07721
1981	1.06589
1982	1.07758
1983	1.05192
1985	1.02829
1986	1.00357
1987	0.99116
1988	0.99391
1989	0.98797
1991	0.99656
1992	0.99946
1993	1.00644
1994	1.02169
1995	1.00811
1996	1.02043
1998	1.00938
1999	1.0478
2000	1.05833
2001	1.03869
2002	1.03284
2003	1.02821
2004	1.04415
2005	1.02506
2006	1.03582
2007	1.06607
2008	1.08626
2009	1.07557
2010	1.05013
2011	1.05584
2012	1.01498
2013	1.03871
2014	1.00543
2015	1.01704
2016	1.02646