Year	Percent
1993	0.18824
1994	0.22714
1995	0.95348
1996	0.9633
1997	0.90737
1998	1.17607
1999	1.32021
2000	1.29669
2001	1.29421
2002	1.23377
2003	1.29394
2004	1.2607
2005	1.27419
2006	1.00351
2007	0.98028
2008	0.95265
2009	0.93139
2010	0.92256
2011	0.8013
2012	0.79596
2013	0.79094
2014	0.78612
2015	0.78168
2016	0.77756
2017	0.77904
2018	0.77476
2019	0.76956
2020	0.77314