Year	Percent
1970	0.8446
1980	0.97898
1981	0.98759
1982	0.99294
1983	0.99219
1984	0.99983
1985	1.0019
1987	1.00441
1988	1.00781
1989	1.01032
1990	1.02174
1991	1.01626
1992	1.02338
1993	1.0257
1994	1.0317
1995	1.03304
2014	1.0397
2015	1.03954
2016	1.03336