Year	Percent
1992	0.68687
1993	0.67484
1994	0.71041
1995	0.37456
1996	0.63526
1997	0.74432
1998	0.72715
1999	0.61097
2000	0.68909
2001	0.67865
2002	0.75342
2003	0.74069
2004	0.77773
2005	0.79448
2006	0.89664
2007	0.88617
2008	0.878
2009	0.85496
2010	0.84022
2011	0.82491
2012	0.8233
2013	0.83445
2014	0.82456
2015	0.81292
2016	0.81295
2017	0.8458
2018	0.84817
2019	0.82037
2020	0.82026