Year	Percent
1990	84.474
1991	84.604
1992	84.751
1993	84.926
1994	85.1
1995	85.29
1996	85.417
1997	85.545
1998	85.689
1999	85.851
2000	86.028
2001	86.194
2002	86.358
2003	86.517
2004	86.67
2005	86.815
2006	86.95
2007	87.079
2008	87.203
2009	87.327
2010	87.454
2011	87.601
2012	87.751
2013	87.903
2014	88.052
2015	88.198
2016	88.313
2017	88.447
2018	88.58
2019	88.711
2020	88.84
2021	88.964
2022	89.085
2023	89.204
2024	89.323
2025	89.443
2026	89.563
2027	89.685
2028	89.806
2029	89.923
2030	90.033