Year	Percent
1990	94.728
1991	94.493
1992	94.157
1993	94.424
1994	94.762
1995	95.094
1996	94.907
1997	94.047
1998	93.554
1999	93.349
2000	93.207
2001	92.825
2002	92.86
2003	93.358
2004	93.729
2005	94.407
2006	92.896
2007	92.98
2008	93.918
2009	95.176
2010	96.197
2011	94.988
2012	94.369
2013	94.303
2014	94.707
2015	95.338
2016	95.054
2017	94.945
2018	95.084
2019	95.473
2020	96.001
2021	95.639
2022	95.362
2023	95.257
2024	95.371
2025	95.646
2026	95.266
2027	95.018
2028	94.949
2029	95.07
2030	95.326