Year	%
1990	66.6753512931409
1991	66.785329324332
1992	66.7537867537868
1993	66.6704313274536
1994	66.5433857505525
1995	66.6139878950908
1996	66.4917776037588
1997	66.3475759760385
1998	66.1697305464618
1999	65.953263519894
2000	65.7035456244595
2001	65.6984113571066
2002	65.406231861489
2003	65.1935259914953
2004	64.9241283618221
2005	64.6101960902664
2006	64.3459307982719
2007	63.994536083293
2008	63.6051384766363
2009	63.2062072379901
2010	62.8627264217562
2011	62.6407533899165
2012	62.504062469806
2013	62.3759226266225
2014	62.3934337894271
2015	62.2868538178455
2016	62.4089064933567
2017	62.865679671813
2018	63.2963329652336
2019	63.6756098703001
2020	64.0186787529186
2021	64.3973163623819
2022	64.6908673379262