Year	Percent
1990	94.879
1991	94.915
1992	94.99
1993	95.075
1994	95.14
1995	95.168
1996	95.167
1997	95.132
1998	95.073
1999	95.018
2000	94.982
2001	94.961
2002	94.946
2003	94.964
2004	94.888
2005	95.09
2006	95.277
2007	95.453
2008	95.62
2009	95.652
2010	96.327
2011	96.326
2012	96.324
2013	96.325
2014	95.927
2015	95.459
2016	95.472
2017	95.594
2018	95.718
2019	95.84
2020	95.957
2021	96.071
2022	96.181
2023	96.29
2024	96.396
2025	96.501
2026	96.605
2027	96.705
2028	96.802
2029	96.893
2030	96.98