Year	Percent
1990	84.23
1991	84.191
1992	84.166
1993	84.141
1994	84.112
1995	84.096
1996	84.104
1997	84.121
1998	84.139
1999	84.159
2000	84.174
2001	84.203
2002	84.167
2003	84.182
2004	84.178
2005	84.162
2006	84.919
2007	85.596
2008	86.19
2009	86.699
2010	87.118
2011	86.861
2012	86.553
2013	85.676
2014	84.672
2015	83.517
2016	83.41
2017	83.606
2018	83.809
2019	84.014
2020	84.218
2021	84.421
2022	84.623
2023	84.823
2024	85.021
2025	85.213
2026	85.403
2027	85.588
2028	85.766
2029	85.935
2030	86.093