Year	Percent
1990	88.797
1991	88.84
1992	88.88
1993	88.928
1994	88.959
1995	88.969
1996	88.968
1997	88.955
1998	88.93
1999	88.898
2000	89.203
2001	89.5
2002	89.789
2003	90.07
2004	90.341
2005	90.602
2006	90.857
2007	91.104
2008	91.347
2009	91.589
2010	91.834
2011	92.082
2012	92.332
2013	92.581
2014	92.825
2015	93.061
2016	93.29
2017	93.383
2018	93.47
2019	93.55
2020	93.62
2021	93.683
2022	93.736
2023	93.782
2024	93.824
2025	93.867
2026	93.911
2027	93.956
2028	94
2029	94.043
2030	94.083