Year	Percent
1990	94.805
1991	95.255
1992	94.902
1993	94.836
1994	94.965
1995	93.91
1996	93.722
1997	93.303
1998	94.256
1999	94.062
2000	94.196
2001	94.189
2002	94.963
2003	94.067
2004	95.304
2005	95.522
2006	95.336
2007	94.901
2008	93.68
2009	94.038
2010	94.808
2011	93.883
2012	94.615
2013	94.325
2014	94.909
2015	93.936
2016	93.098
2017	93.133
2018	93.168
2019	93.203
2020	93.241
2021	93.28
2022	93.319
2023	93.358
2024	93.398
2025	93.44
2026	93.488
2027	93.539
2028	93.593
2029	93.647
2030	93.701