Year	%
1990	55.9634249189933
1991	56.7655042806431
1992	57.5504069421206
1993	58.2517598539973
1994	58.6027194856538
1995	59.0461522487757
1996	59.3996840442338
1997	59.6692740496775
1998	60.0342770090136
1999	60.1185181762525
2000	60.1672204952299
2001	60.2019590023225
2002	60.2222670083206
2003	60.2082653024201
2004	60.1787852865697
2005	60.1427140099215
2006	60.102359567192
2007	60.0627481301949
2008	60.0322838694932
2009	60.0173091188834
2010	59.9914475644996
2011	60.059739172275
2012	60.1980593572756
2013	60.395471537406
2014	60.7721756629078
2015	61.2070549329414
2016	61.7171677831438
2017	62.1738044699713
2018	62.5572387127728
2019	62.8848161385995
2020	63.1835877155039
2021	63.4984566229828
2022	63.8014762365987