Year	Percent
1990	1.02957
1991	1.10237
1992	1.04576
1993	1.01855
1994	0.86729
1995	1.93319
1996	1.88381
1997	2.02062
1998	1.96668
1999	1.88708
2000	1.85903
2001	1.79576
2002	1.75973
2003	1.72359
2004	1.67297
2005	1.68601
2006	1.87886
2007	1.87916
2008	1.81582
2009	1.77137
2010	1.73363
2011	1.69714
2012	1.7417
2013	1.68785
2014	1.37278
2015	1.43007
2016	1.39501
2017	1.33799
2018	1.2555
2019	1.24896
2020	1.24444