Year	Percent
1990	1.78505
1991	1.72485
1992	1.52065
1993	1.46743
1994	1.44335
1995	1.72562
1996	1.56251
1997	1.52812
1998	1.51954
1999	1.5216
2000	1.36671
2001	1.29053
2002	1.05809
2003	1.06328
2004	0.9356
2005	0.92072
2006	0.85192
2007	0.81807
2008	0.81354
2009	0.68038
2010	0.67239
2011	0.65044
2012	0.94533
2013	0.94437
2014	0.93895
2015	0.94205
2016	0.97106
2017	1.0362
2018	1.06967
2019	1.03124
2020	1.03587