Year	Percent
1990	82.319
1991	82.505
1992	82.612
1993	82.715
1994	82.898
1995	82.997
1996	83.031
1997	83.467
1998	85.141
1999	84.757
2000	84.354
2001	83.94
2002	83.497
2003	83.739
2004	84.219
2005	84.627
2006	85.649
2007	85.408
2008	85.149
2009	84.862
2010	82.944
2011	82.353
2012	82.336
2013	82.113
2014	82.77
2015	83.76
2016	84.03
2017	84.018
2018	84.007
2019	83.983
2020	83.939
2021	83.886
2022	83.814
2023	83.729
2024	83.64
2025	83.552
2026	83.47
2027	83.389
2028	83.309
2029	83.232
2030	83.161