Year	%
1990	47.3141773724755
1991	47.8043118861471
1992	48.325609670462
1993	48.903076138988
1994	49.3585833480609
1995	49.7913858916701
1996	50.1766837346081
1997	50.5401824549382
1998	50.8618686961386
1999	51.1527260712744
2000	51.4020331633427
2001	51.5989994720883
2002	51.7395534387016
2003	51.8458896483304
2004	51.916734043982
2005	51.9628229987055
2006	52.0138046110791
2007	52.0703526209951
2008	52.1348357824909
2009	52.2043887290035
2010	52.323087532113
2011	52.4345038154892
2012	52.5734865902593
2013	52.7426698318354
2014	52.9023289023524
2015	53.0610360426881
2016	53.2043791976964
2017	53.327970925241
2018	53.4251806863912
2019	53.4872412011353
2020	53.5227355385831
2021	53.5139597503201
2022	53.4466026722437