Year	Percent
1990	85.54
1991	85.653
1992	85.512
1993	85.46
1994	85.659
1995	85.439
1996	85.571
1997	85.587
1998	85.57
1999	85.612
2000	85.698
2001	85.853
2002	85.843
2003	85.784
2004	85.833
2005	85.89
2006	85.718
2007	85.682
2008	85.6
2009	85.656
2010	85.747
2011	85.813
2012	85.812
2013	85.784
2014	85.762
2015	85.716
2016	85.719
2017	85.743
2018	85.756
2019	85.745
2020	85.7
2021	85.664
2022	85.594
2023	85.505
2024	85.435
2025	85.404
2026	85.447
2027	85.535
2028	85.643
2029	85.732
2030	85.788