Year	Percent
1990	91.271
1991	91.504
1992	92.006
1993	92.619
1994	92.971
1995	93.578
1996	93.731
1997	93.712
1998	93.525
1999	93.326
2000	93.253
2001	93.357
2002	93.574
2003	93.799
2004	94.007
2005	94.124
2006	94.191
2007	94.183
2008	94.147
2009	94.11
2010	94.125
2011	94.153
2012	94.227
2013	94.321
2014	94.436
2015	94.557
2016	94.695
2017	94.791
2018	94.886
2019	94.973
2020	95.047
2021	95.11
2022	95.162
2023	95.207
2024	95.25
2025	95.295
2026	95.34
2027	95.387
2028	95.432
2029	95.474
2030	95.51