Year	Percent
1975	1.01529
1976	1.00438
1979	1.03933
1980	1.01786
1983	1.05293
1991	1.06164
1993	1.15172
1994	1.19213
1995	1.19569
1996	1.17756
1997	1.16582
1998	1.15456
1999	1.12483
2000	1.11675
2001	1.11354
2002	1.10486
2003	1.08099
2004	1.06395
2005	1.06134
2006	1.05493
2009	1.03262
2010	1.02417
2015	1.00249
2016	0.99251