Year	%
1990	23.2379623168179
1991	23.4587670136109
1992	23.6593736593737
1993	23.8888888888889
1994	24.1203703703704
1995	24.3397767492513
1996	24.5500183665973
1997	24.7649955237243
1998	24.9714937286203
1999	25.1826220684352
2000	25.3703373192932
2001	25.5951883718988
2002	25.8636934673367
2003	26.1343416370107
2004	26.3820509213673
2005	26.6086374288584
2006	26.8161778800077
2007	26.9971273149563
2008	27.1538326197877
2009	27.2773222509267
2010	27.3718120805369
2011	27.4863444295579
2012	27.5628003765545
2013	27.5424537302042
2014	27.5949134646284
2015	27.6084745013048
2016	27.6703577512777
2017	27.723623853211
2018	27.7484227129337
2019	27.6774832419257
2020	27.5508694043655
2021	27.4062578945469
2022	27.1894736842105