Year	Percent
1990	89.638
1991	89.667
1992	89.66
1993	89.735
1994	89.81
1995	89.869
1996	89.959
1997	90.027
1998	90.008
1999	89.895
2000	89.679
2001	89.368
2002	88.949
2003	88.443
2004	87.876
2005	90.165
2006	92.061
2007	93.617
2008	94.877
2009	94.911
2010	94.855
2011	94.76
2012	94.494
2013	94.377
2014	94.417
2015	94.363
2016	94.088
2017	94.122
2018	94.157
2019	94.204
2020	94.267
2021	94.35
2022	94.445
2023	94.548
2024	94.654
2025	94.762
2026	94.874
2027	94.988
2028	95.104
2029	95.221
2030	95.341