Year	Percent
1990	83.332
1991	81.157
1992	83.021
1993	84.164
1994	85.177
1995	86.156
1996	85.918
1997	85.587
1998	85.714
1999	85.844
2000	85.985
2001	86.151
2002	86.327
2003	86.508
2004	87.038
2005	87.291
2006	87.528
2007	87.753
2008	87.972
2009	88.189
2010	87.276
2011	87.593
2012	87.134
2013	87.454
2014	87.333
2015	87.641
2016	87.44
2017	87.569
2018	87.695
2019	87.822
2020	87.953
2021	88.085
2022	88.221
2023	88.359
2024	88.497
2025	88.632
2026	88.763
2027	88.891
2028	89.016
2029	89.142
2030	89.27