Year	Percent
1990	94.483
1991	94.258
1992	93.878
1993	94.146
1994	94.474
1995	94.797
1996	94.585
1997	93.578
1998	93.015
1999	92.781
2000	92.586
2001	92.257
2002	92.313
2003	92.86
2004	93.218
2005	93.966
2006	92.481
2007	92.594
2008	93.522
2009	94.768
2010	95.785
2011	94.572
2012	93.999
2013	93.971
2014	94.401
2015	95.049
2016	94.739
2017	94.582
2018	94.661
2019	94.98
2020	95.429
2021	94.992
2022	94.634
2023	94.438
2024	94.443
2025	94.59
2026	94.081
2027	93.689
2028	93.456
2029	93.384
2030	93.416