Year	%
1984	16.277039502766293
1985	20.425805056804908
1986	25.392248271515616
1987	29.616299285976417
1988	34.59600553111403
1989	40.19839521850981
1990	45.05144168510068
1991	44.892335486307644
1992	45.155932645511854
1993	46.956072252951564
1994	48.949096563580945
1995	52.23849449554755
1996	51.97040918454697
1997	55.25664729747334
1998	56.64349232236491
1999	57.8413215665509
2000	61.550071803708505
2001	62.88443079227397
2002	66.68736647544979
2003	68.60276429478158
2004	70.64647252669057
2005	72.34976228178357
2006	74.31564440044045
2007	75.43835354959504
2008	77.40458080078761
2009	81.05145592006383
2010	79.3546082453661
2011	75.91093828671892
2012	74.12386601562646
2013	74.97810552260326
2014	76.1099404428064
2015	76.91705752622275
2016	76.95186841747554
2017	79.60774278170481
2018	80.69959918848468
2019	80.45320055712416
2020	81.14941784953832
2021	80.21170802491712
2022	79.66654310474281