Year	Percent
1990	65.625
1991	71.715
1992	72.362
1993	72.154
1994	73.311
1995	73.226
1996	73.732
1997	74.475
1998	75.288
1999	76.519
2000	76.968
2001	77.504
2002	78.11
2003	78.819
2004	78.763
2005	79.067
2006	80.31
2007	80.617
2008	80.519
2009	81.007
2010	81.345
2011	82.15
2012	82.251
2013	82.44
2014	82.477
2015	82.574
2016	82.655
2017	82.842
2018	83.03
2019	83.223
2020	83.422
2021	83.634
2022	83.851
2023	84.072
2024	84.301
2025	84.537
2026	84.783
2027	85.041
2028	85.307
2029	85.577
2030	85.846