Year	Percent
1991	77.209
1992	80.419
1993	81.402
1994	80.666
1995	81.142
1996	81.797
1997	80.849
1998	80.296
1999	83.57
2000	84.555
2001	85.881
2002	85.608
2003	86.612
2004	86.149
2005	86.316
2006	87.641
2007	88.872
2008	89.152
2009	89.007
2010	90.003
2011	90.077
2012	90.488
2013	89.748
2014	90.048
2015	91.328
2016	90.879
2017	91.672
2018	92.65
2019	93.086
2020	93.475
2021	93.934
2022	94.293