Year	Percent
1990	74.3
1991	73.757
1992	74.99
1993	74.204
1994	74.12
1995	75.152
1996	76.206
1997	76.858
1998	78.61
1999	77.713
2000	78.014
2001	79.469
2002	80.642
2003	80.549
2004	80.802
2005	81.326
2006	81.214
2007	81.931
2008	83.623
2009	83.931
2010	81.958
2011	82.884
2012	83.638
2013	83.604
2014	84.801
2015	84.869
2016	85.553
2017	85.741
2018	85.929
2019	86.116
2020	86.303
2021	86.486
2022	86.665
2023	86.841
2024	87.017
2025	87.195
2026	87.375
2027	87.559
2028	87.749
2029	87.941
2030	88.137