Year	Percent
1990	65.129
1991	65.109
1992	65.064
1993	65.034
1994	65.019
1995	65.016
1996	64.979
1997	64.909
1998	64.545
1999	64.456
2000	64.414
2001	64.406
2002	64.383
2003	64.375
2004	64.384
2005	64.406
2006	64.434
2007	64.482
2008	64.545
2009	64.627
2010	64.736
2011	64.885
2012	64.969
2013	65.079
2014	65.2
2015	65.328
2016	65.44
2017	65.563
2018	65.679
2019	65.787
2020	65.886
2021	65.97
2022	66.047
2023	66.117
2024	66.184
2025	66.251
2026	66.311
2027	66.373
2028	66.44
2029	66.516
2030	66.605