Year	Percent
1991	86.193
1992	84.153
1993	90.087
1994	89.109
1995	88.594
1996	91.672
1997	92.169
1998	91.561
1999	91.619
2000	92.131
2001	92.301
2002	92.424
2003	92.089
2004	91.972
2005	93.124
2006	93.613
2007	93.392
2008	92.687
2009	95.119
2010	94.473
2011	94.963
2012	95.173
2013	94.795
2014	94.918
2015	94.857
2016	94.716
2017	94.795
2018	94.957
2019	95.113
2020	95.247
2021	95.381
2022	95.484