Year	Percent
1990	94.818
1991	94.836
1992	94.88
1993	94.911
1994	94.924
1995	94.939
1996	94.954
1997	94.965
1998	94.97
1999	94.972
2000	94.97
2001	94.96
2002	94.957
2003	94.938
2004	94.923
2005	94.928
2006	94.938
2007	94.943
2008	94.375
2009	93.739
2010	93.917
2011	94.667
2012	94.451
2013	94.888
2014	94.858
2015	94.796
2016	94.807
2017	94.782
2018	94.758
2019	94.735
2020	94.712
2021	94.692
2022	94.673
2023	94.654
2024	94.634
2025	94.612
2026	94.59
2027	94.565
2028	94.538
2029	94.51
2030	94.483