Year	Percent
1990	61.563
1991	61.555
1992	61.583
1993	62.757
1994	63.919
1995	65.068
1996	66.203
1997	67.321
1998	68.422
1999	69.502
2000	70.561
2001	71.598
2002	72.613
2003	74.636
2004	76.547
2005	78.346
2006	80.034
2007	81.611
2008	83.079
2009	84.442
2010	85.704
2011	83.416
2012	83.609
2013	83.865
2014	84.131
2015	84.356
2016	84.563
2017	84.926
2018	85.29
2019	85.655
2020	86.021
2021	86.387
2022	86.755
2023	87.125
2024	87.495
2025	87.868
2026	88.24
2027	88.615
2028	88.991
2029	89.366
2030	89.742