Year	Percent
1990	60.03
1991	60.768
1992	61.808
1993	62.815
1994	63.793
1995	64.744
1996	65.677
1997	66.588
1998	67.483
1999	68.361
2000	69.227
2001	70.082
2002	71.008
2003	72.27
2004	73.708
2005	74.62
2006	75.973
2007	76.772
2008	77.696
2009	78.335
2010	78.839
2011	79.428
2012	79.885
2013	80.388
2014	80.9
2015	81.48
2016	81.856
2017	82.121
2018	82.387
2019	82.657
2020	82.934
2021	83.219
2022	83.51
2023	83.804
2024	84.099
2025	84.391
2026	84.683
2027	84.973
2028	85.262
2029	85.55
2030	85.836