Year	Percent
1993	1.05514
1997	1.07982
1998	1.04479
1999	1.00644
2000	1.03499
2006	0.99689
2010	1.00519
2011	1.00623
2012	1.00784
2013	1.01306
2014	1.01562
2015	1.02118
2016	1.01626
2017	1.0123