Year	Percent
1992	0.21224
1993	0.21198
1994	0.21007
1995	1.23914
1996	1.58482
1997	0.67425
1998	0.66196
1999	0.64905
2000	0.44596
2001	0.43129
2002	0.41715
2003	0.4038
2004	0.64816
2005	0.68957
2006	0.88737
2007	0.87659
2008	0.86746
2009	0.81529
2010	0.79606
2011	0.77804
2012	0.7611
2013	0.74427
2014	0.72785
2015	0.71169
2016	0.69556
2017	0.71622
2018	0.69966
2019	0.6995
2020	0.6906