Year	Percent
1990	96.01
1991	95.95
1992	95.964
1993	95.98
1994	95.97
1995	96.036
1996	96.023
1997	96.037
1998	96.061
1999	96.084
2000	96.093
2001	96.115
2002	96.128
2003	96.091
2004	96.095
2005	96.087
2006	96.099
2007	96.12
2008	96.159
2009	96.206
2010	96.216
2011	96.561
2012	96.326
2013	96.456
2014	96.627
2015	96.629
2016	96.62
2017	96.566
2018	96.508
2019	96.448
2020	96.39
2021	96.335
2022	96.281
2023	96.23
2024	96.179
2025	96.13
2026	96.086
2027	96.044
2028	96.006
2029	95.975
2030	95.953