Year	Percent
1990	95.161
1991	95.18
1992	95.781
1993	96.299
1994	96.531
1995	96.793
1996	96.597
1997	96.365
1998	96.328
1999	96.237
2000	96.17
2001	96.1
2002	96.026
2003	95.951
2004	96.481
2005	96.425
2006	96.341
2007	96.119
2008	97.126
2009	96.791
2010	96.83
2011	96.493
2012	96.989
2013	97.001
2014	96.863
2015	96.712
2016	96.509
2017	96.556
2018	96.604
2019	96.652
2020	96.7
2021	96.747
2022	96.795
2023	96.842
2024	96.89
2025	96.94
2026	96.991
2027	97.042
2028	97.095
2029	97.148
2030	97.2