Year	Percent
1990	96.432
1991	96.44
1992	96.456
1993	96.461
1994	96.456
1995	96.424
1996	96.4
1997	96.375
1998	96.341
1999	96.296
2000	96.253
2001	96.215
2002	96.173
2003	96.141
2004	96.102
2005	96.061
2006	96.061
2007	96.017
2008	95.997
2009	95.98
2010	95.954
2011	95.918
2012	96.301
2013	96.628
2014	96.907
2015	96.858
2016	96.809
2017	96.821
2018	96.832
2019	96.841
2020	96.85
2021	96.858
2022	96.865
2023	96.871
2024	96.877
2025	96.884
2026	96.89
2027	96.897
2028	96.904
2029	96.91
2030	96.917