Year	%
1990	56.8606220119605
1991	57.5233498681682
1992	58.058860363181
1993	58.5048954126134
1994	58.843510230179
1995	59.1172374820884
1996	59.3413431721905
1997	59.6075592101599
1998	59.8160772506747
1999	59.9956772175599
2000	60.1384659013847
2001	60.243670215331
2002	60.3261049700867
2003	60.3964834218041
2004	60.4383228190562
2005	60.4834459465375
2006	60.5048157704856
2007	60.53646416321
2008	60.6177706709798
2009	60.7051054436834
2010	60.7742108542641
2011	60.8970799897212
2012	61.0693064028792
2013	61.2874587960052
2014	61.543389579298
2015	61.8464747205867
2016	62.1009582943927
2017	62.4314638373779
2018	62.8242143785368
2019	63.2512658657692
2020	63.6580976675985
2021	64.0055642245854
2022	64.2560364128818