Year	Percent
1972	1.01688
1973	1.02584
1974	1.02892
1976	1.05043
1977	1.04933
1978	1.05188
1979	1.0542
1980	1.05863
1981	1.05712
1982	1.0668
1983	1.06464
1984	1.08516
1985	1.08932
1986	1.08514
1987	1.08585
1988	1.08339
1989	1.07691
1990	1.08712
1991	1.09401
1992	1.1061
1993	1.09169
1994	1.08613
1995	1.07793
1996	1.09221
1997	1.07399
1998	1.05196
1999	1.0477
2000	1.04842
2001	1.05447
2002	1.0566
2003	1.05271
2004	1.02023
2005	1.02006
2006	1.02063
2007	1.02228
2008	1.02243
2009	1.02362
2010	1.02251
2011	1.02109
2012	1.02182
2013	1.05417
2014	1.05652
2015	1.05697
2016	1.05755