Year	Percent
1990	77.535
1991	77.623
1992	77.69
1993	77.557
1994	77.623
1995	77.613
1996	77.659
1997	77.766
1998	77.873
1999	78.215
2000	78.517
2001	78.765
2002	78.988
2003	79.215
2004	79.48
2005	79.798
2006	80.198
2007	80.628
2008	81.077
2009	81.533
2010	81.988
2011	82.47
2012	82.937
2013	83.386
2014	82.927
2015	82.566
2016	82.135
2017	82.437
2018	82.728
2019	82.997
2020	83.239
2021	83.462
2022	83.661
2023	83.854
2024	84.064
2025	84.301
2026	84.564
2027	84.844
2028	85.128
2029	85.396
2030	85.638