Year	Percent
1990	77.067
1991	77.304
1992	77.418
1993	77.702
1994	78.133
1995	78.529
1996	78.877
1997	79.196
1998	77.4
1999	75.469
2000	77.447
2001	79.313
2002	81.039
2003	82.627
2004	84.085
2005	84.155
2006	84.241
2007	84.324
2008	84.41
2009	84.503
2010	84.605
2011	84.735
2012	84.854
2013	84.914
2014	84.983
2015	85.047
2016	85.162
2017	85.43
2018	85.697
2019	85.962
2020	86.221
2021	86.474
2022	86.721
2023	86.961
2024	87.196
2025	87.425
2026	87.649
2027	87.869
2028	88.082
2029	88.287
2030	88.484