Year	Percent
1976	0.97961
1981	1.00996
1982	1.01708
1983	1.01562
1984	1.01825
1985	1.01807
1986	1.02232
1987	1.02227
1988	1.02168
1989	1.02152
1990	1.02165
1991	1.02705
1992	1.02713
1993	1.02967
1994	1.03699
1995	1.02882
2010	0.99719
2011	0.9955
2012	1.01793
2013	1.01721
2016	1.0116