Year	Percent
2000	80.93025
2001	81.50317
2002	82.07754
2003	82.65335
2004	83.23062
2005	83.80933
2006	84.3895
2007	84.97111
2008	85.55417
2009	86.13869
2010	86.72465
2011	87.31205
2012	87.90091
2013	88.49122
2014	89.08298
2015	89.67618
2016	90.27084
2017	90.86694
2018	91.46449
2019	92.06349
2020	92.66395
2021	92.81216
2022	92.96038