Year	%
1990	54.2857142857143
1991	60.9243697478992
1992	66.6666666666667
1993	68.8102893890675
1994	69.8924731182796
1995	70.046511627907
1996	69.7602474864656
1997	69.1607026675342
1998	68.0525164113786
1999	66.219342896807
2000	63.8272583201268
2001	60.9941318605454
2002	57.751586582049
2003	55.2456839309429
2004	53.4531693472091
2005	52.1739130434783
2006	51.1962653180315
2007	50.467794170565
2008	49.9072356215213
2009	49.4708146247595
2010	49.1535857186827
2011	48.9190398091546
2012	48.7625899280576
2013	48.8885782189291
2014	49.0589198036007
2015	49.2879009716491
2016	49.518479958355
2017	49.7774386366527
2018	49.1343775762572
2019	49.818224463469
2020	49.9658392165794
2021	50.0721821210439
2022	50.1513186338089