Year	%
1990	54.36389090088997
1991	54.88833959287353
1992	55.62739283106762
1993	56.247536317872324
1994	56.41915780465977
1995	56.630685537261066
1996	56.78944067643548
1997	56.92851147529027
1998	56.9742947941227
1999	57.00788786207683
2000	57.08439450971929
2001	57.03468549859741
2002	57.03794552920287
2003	56.98812496290662
2004	57.00763446045782
2005	57.07460534574964
2006	57.116958207927794
2007	57.15481713345862
2008	57.236059951851736
2009	57.326984762739755
2010	57.41048003490707
2011	57.59183169676155
2012	57.87853651747065
2013	58.15717149528572
2014	58.54939180025814
2015	58.89224697745077
2016	59.24603015893085
2017	59.593744620094625
2018	59.90565107370404
2019	60.27311197743692
2020	60.547004633297405
2021	60.79266569869082
2022	61.07910071534143