Year	Percent
1990	92.188
1991	92.666
1992	92.057
1993	91.575
1994	92.109
1995	92.234
1996	92.336
1997	92.054
1998	91.748
1999	91.838
2000	92.108
2001	90.913
2002	91.16
2003	90.333
2004	91.084
2005	92.179
2006	91.885
2007	92.485
2008	92.302
2009	91.811
2010	92.165
2011	90.678
2012	90.748
2013	90.852
2014	90.667
2015	89.898
2016	90.393
2017	90.378
2018	90.365
2019	90.356
2020	90.349
2021	90.345
2022	90.345
2023	90.346
2024	90.345
2025	90.341
2026	90.334
2027	90.324
2028	90.312
2029	90.297
2030	90.281