Year	%
1981	5.009222629667084
1982	7.1840931502601935
1983	7.065913658126913
1984	10.656636627083344
1985	16.481779497716552
1986	21.152118192746908
1987	26.306914535397592
1988	49.885844128605584
1989	47.23469930513877
1990	64.89465201433507
1991	61.25818718195991
1992	59.972998187660444
1993	67.93399862908475
1994	64.21747036695173
1995	65.70675847446545
1996	64.74394457899365
1997	67.51973480223435
1998	67.70751158091396
1999	69.63475742967287
2000	75.42054718699455
2001	77.60352818876304
2002	79.57744127205801
2003	79.62241412016328
2004	81.32855211499364
2005	78.93815285611909
2006	79.1242213922099
2007	78.61520379844534
2008	80.33879029806108
2009	80.29837765934951
2010	86.07602410262649
2011	86.79250586346512
2012	86.8163623259386
2013	85.47986075986962
2014	85.44002853838154
2015	85.38761622915484
2016	84.02534773105515
2017	86.52299736363864
2018	86.37147571384143
2019	86.4966508466004
2020	86.10192089020822
2021	87.101348021241
2022	87.15556010429003