Year	Percent
1990	94.675
1991	93.984
1992	93.205
1993	92.268
1994	91.32
1995	92.219
1996	91.115
1997	90.792
1998	91.067
1999	90.308
2000	89.343
2001	90.396
2002	89.84
2003	89.918
2004	90.509
2005	92.358
2006	92.531
2007	92.881
2008	93.122
2009	92.844
2010	92.911
2011	93.182
2012	93.507
2013	93.591
2014	93.5
2015	93.349
2016	93.32
2017	93.425
2018	93.535
2019	93.661
2020	93.807
2021	93.973
2022	94.157
2023	94.351
2024	94.541
2025	94.716
2026	94.879
2027	95.029
2028	95.169
2029	95.302
2030	95.43