Year	Percent
1990	91.471
1991	91.517
1992	91.55
1993	91.588
1994	92.011
1995	92.414
1996	92.799
1997	93.165
1998	93.512
1999	93.837
2000	94.141
2001	94.427
2002	94.695
2003	94.947
2004	95.187
2005	95.418
2006	95.64
2007	95.852
2008	96.055
2009	96.248
2010	96.458
2011	96.388
2012	96.389
2013	96.145
2014	96.351
2015	96.028
2016	96.198
2017	96.284
2018	96.371
2019	96.459
2020	96.549
2021	96.64
2022	96.733
2023	96.825
2024	96.914
2025	97
2026	97.084
2027	97.164
2028	97.243
2029	97.321
2030	97.4