Year	Percent
1990	64.895
1991	64.881
1992	64.87
1993	64.657
1994	64.679
1995	64.636
1996	64.591
1997	64.583
1998	64.59
1999	64.538
2000	64.484
2001	64.518
2002	64.53
2003	64.591
2004	64.782
2005	64.868
2006	64.828
2007	64.812
2008	64.795
2009	64.787
2010	64.848
2011	64.807
2012	64.834
2013	64.838
2014	64.852
2015	64.828
2016	64.737
2017	64.773
2018	64.813
2019	64.86
2020	64.913
2021	64.97
2022	65.033
2023	65.102
2024	65.177
2025	65.257
2026	65.339
2027	65.425
2028	65.516
2029	65.611
2030	65.71