Year	%
1990	73.972602739726
1991	73
1992	72.1428571428571
1993	70.6185567010309
1994	68.8888888888889
1995	66.9312169312169
1996	64.5833333333333
1997	62.3815967523681
1998	60.5314960629921
1999	59.2485549132948
2000	58.3645109567076
2001	58.063209076175
2002	58.3229813664596
2003	59.068746952706
2004	60.1792324176895
2005	61.5300031416902
2006	62.998712998713
2007	64.4913627639155
2008	65.9269162210339
2009	67.2292229222922
2010	68.347748664462
2011	69.2295162078514
2012	69.8938309714232
2013	70.3810529736757
2014	70.6590441019814
2015	70.7547169811321
2016	70.7251665699041
2017	70.5880900041989
2018	70.3908137704773
2019	70.1741014120667
2020	69.9729897434026
2021	69.8454687002963
2022	69.7684125904397