Year	%
1981	7.006764625392671
1982	9.583799254093794
1983	11.22316380963326
1984	14.1228656538182
1985	16.415363618628717
1986	19.983891259650136
1987	23.047124162216235
1988	28.862264244195025
1989	37.11883221974113
1990	49.06307532858831
1991	50.28010491547315
1992	49.88919880326448
1993	51.68992838420692
1994	55.50420352527312
1995	59.134468673572826
1996	59.02761521276978
1997	60.87119755725463
1998	60.67078590348534
1999	61.290731757601236
2000	64.42986612374867
2001	66.55436266335471
2002	71.02048875499358
2003	73.07212867564128
2004	76.79827377090001
2005	77.93019479644794
2006	79.29053449808895
2007	79.94075707440088
2008	81.31838176766229
2009	85.47907178653199
2010	82.95530058157195
2011	81.05091572597767
2012	78.64013746249688
2013	79.77377168775638
2014	82.25333158489376
2015	82.98801560935108
2016	83.010736833001
2017	85.50957261653309
2018	85.53315406192282
2019	85.27978920499385
2020	84.69978053674977
2021	83.89858615836648
2022	82.65315575344069