Year	Percent
1990	96.771
1991	96.83
1992	96.789
1993	96.645
1994	96.649
1995	96.707
1996	96.655
1997	96.609
1998	96.779
1999	96.505
2000	96.507
2001	96.488
2002	96.463
2003	96.179
2004	96.008
2005	96.139
2006	96.273
2007	96.401
2008	96.139
2009	96.162
2010	95.8
2011	95.66
2012	95.419
2013	95.294
2014	95.536
2015	95.754
2016	95.734
2017	95.67
2018	95.603
2019	95.537
2020	95.477
2021	95.421
2022	95.373
2023	95.33
2024	95.293
2025	95.259
2026	95.227
2027	95.199
2028	95.172
2029	95.146
2030	95.119