Year	%
1990	9.38408067916358
1991	11.9666444524188
1992	14.3079291279216
1993	16.3608810157871
1994	18.0455980357769
1995	19.3612883043401
1996	20.288497564631
1997	20.9138886678866
1998	21.317706264071
1999	21.5641387387867
2000	21.6965127238454
2001	21.736869474779
2002	21.7047770611721
2003	21.6169789892107
2004	21.5115354017502
2005	21.4139208192536
2006	21.3406885829185
2007	21.4516881670254
2008	21.8160395172133
2009	22.187948892417
2010	22.4717753422193
2011	22.6588826485368
2012	22.8168279538738
2013	22.9798551380715
2014	23.139109632359
2015	23.3139194723685
2016	23.483610742367
2017	23.5604069314642
2018	23.5843408175014
2019	23.5798124631156
2020	23.6302120860875
2021	23.6854713139298
2022	23.7628994753733