Year	%
1980	16.9226930477841
1981	18.49263270039975
1982	24.32355759493177
1983	26.35378383535087
1984	29.328418997737703
1985	33.884848432379016
1986	39.391849308648496
1987	46.791109827116436
1988	52.441148395683676
1989	54.46949878798617
1990	65.15556656363341
1991	67.22806726197379
1992	68.66199395349481
1993	71.04272922067672
1994	71.68728509158319
1995	72.70196506778188
1996	72.75987750055417
1997	74.83245117546943
1998	74.69552919395719
1999	75.72042824237512
2000	77.40485352735296
2001	77.28691454557394
2002	80.20044987595374
2003	80.12426193494545
2004	80.36653757581225
2005	80.5879302097019
2006	81.47165506515702
2007	81.11171640842575
2008	81.72291971852519
2009	83.48536895016869
2010	83.8815848514366
2011	81.64117198872681
2012	81.9298253346258
2013	82.01650972769316
2014	82.04075838893037
2015	82.40104356989109
2016	82.59625617339604
2017	84.96607885923102
2018	85.51779241293461
2019	85.31643766637495
2020	85.9762429714367
2021	85.92980449313629
2022	87.13842408229124