Year	Percent
1991	0.692
1992	0.556
1993	0.589
1994	0.615
1995	0.608
1996	0.578
1997	0.701
1998	0.691
1999	0.709
2000	0.701
2001	0.709
2002	0.705
2003	0.754
2004	0.772
2005	0.87
2006	0.786
2007	0.85
2008	0.778
2009	0.793
2010	0.826
2011	0.779
2012	0.761
2013	0.766
2014	0.775
2015	0.717
2016	0.748
2017	0.798
2018	0.813
2019	0.812
2020	0.811
2021	0.81
2022	0.807