Year	Percent
1990	96.939
1991	96.909
1992	96.994
1993	96.528
1994	96.573
1995	96.846
1996	96.633
1997	96.39
1998	96.112
1999	96.108
2000	96.06
2001	96.371
2002	95.921
2003	95.352
2004	95.217
2005	95.054
2006	96.792
2007	95.853
2008	95.949
2009	96.032
2010	95.954
2011	96.105
2012	96.126
2013	95.916
2014	95.995
2015	95.468
2016	95.379
2017	95.409
2018	95.439
2019	95.468
2020	95.494
2021	95.519
2022	95.543
2023	95.567
2024	95.592
2025	95.618
2026	95.645
2027	95.672
2028	95.699
2029	95.728
2030	95.757