Year	Percent
1990	90.249
1991	90.249
1992	90.256
1993	90.261
1994	90.251
1995	90.328
1996	90.437
1997	90.515
1998	90.546
1999	90.57
2000	87.24
2001	90.094
2002	89.555
2003	89.738
2004	89.687
2005	90.54
2006	90.715
2007	90.861
2008	90.981
2009	91.079
2010	91.023
2011	92.46
2012	93.485
2013	92.401
2014	92.095
2015	92.886
2016	91.837
2017	91.976
2018	92.114
2019	92.247
2020	92.372
2021	92.49
2022	92.6
2023	92.702
2024	92.801
2025	92.9
2026	93.002
2027	93.104
2028	93.208
2029	93.313
2030	93.42