Year	Percent
1992	0.53217
1993	0.53989
1994	0.54831
1995	0.49569
1996	0.55987
1997	0.57677
1998	0.87475
1999	0.93145
2000	0.98017
2001	1.03726
2002	1.66322
2003	1.61616
2004	1.75375
2005	1.86244
2006	1.5853
2007	1.58623
2008	1.58736
2009	1.66121
2010	1.68484
2011	1.57586
2012	1.58603
2013	1.49797
2014	1.85525
2015	1.92917
2016	2.00752
2017	2.32751
2018	2.6947
2019	2.50833
2020	2.48962