Year	Percent
1990	95.92
1991	95.817
1992	95.779
1993	95.865
1994	95.999
1995	95.998
1996	96.072
1997	96.014
1998	96.069
1999	96.23
2000	96.212
2001	96.193
2002	96.365
2003	96.484
2004	96.289
2005	96.156
2006	96.01
2007	95.739
2008	95.421
2009	95.069
2010	95.609
2011	95.41
2012	94.816
2013	94.817
2014	94.937
2015	95.097
2016	95.417
2017	95.346
2018	95.278
2019	95.211
2020	95.143
2021	95.075
2022	95.006
2023	94.935
2024	94.863
2025	94.789
2026	94.714
2027	94.637
2028	94.559
2029	94.482
2030	94.405