Year	%
1981	7.4967289202135445
1982	9.162837533649295
1983	10.846741793060566
1984	13.318743530592643
1985	16.676127173813683
1986	21.723543083678653
1987	26.791221189547986
1988	30.72806130475321
1989	37.68178401738352
1990	47.95854719815842
1991	49.86592293185407
1992	50.656335621835865
1993	52.328238612581316
1994	54.439700093651766
1995	57.65969829135492
1996	58.19223910946017
1997	60.843728319466265
1998	61.248027656353344
1999	62.20179770716543
2000	65.4282683053891
2001	67.46905584102535
2002	71.24923891205597
2003	72.82947968528988
2004	75.03645667140572
2005	75.89108809851128
2006	77.3244009243156
2007	77.46648094608099
2008	79.19600931811573
2009	82.55851016384848
2010	81.34686619630264
2011	77.39208734990751
2012	76.06061894283069
2013	76.65404507520165
2014	77.56315140101167
2015	78.18234076051795
2016	78.80302968609047
2017	81.41699576987857
2018	82.15599247650898
2019	82.15335256286038
2020	82.53349939198849
2021	82.1046468109366
2022	81.60018781599193