Year	Percent
1990	63.811
1991	64.856
1992	66.94
1993	68.865
1994	71.696
1995	73.364
1996	73.76
1997	74.185
1998	75.345
1999	76.266
2000	76.799
2001	76.974
2002	79.247
2003	79.733
2004	78.656
2005	79.461
2006	80.116
2007	80.536
2008	80.948
2009	82.057
2010	82.364
2011	83.215
2012	84.013
2013	84.531
2014	84.532
2015	84.386
2016	84.914
2017	85.139
2018	85.365
2019	85.597
2020	85.838
2021	86.086
2022	86.343
2023	86.604
2024	86.867
2025	87.13
2026	87.394
2027	87.66
2028	87.927
2029	88.192
2030	88.455