Year	Percent
1990	69.127
1991	68.995
1992	69.028
1993	68.935
1994	68.799
1995	68.666
1996	68.728
1997	68.738
1998	68.662
1999	68.607
2000	68.658
2001	68.694
2002	68.89
2003	68.991
2004	69.189
2005	71.559
2006	73.846
2007	76.023
2008	78.08
2009	80.013
2010	81.823
2011	82.624
2012	83.265
2013	83.763
2014	84.136
2015	84.014
2016	83.838
2017	84.058
2018	84.269
2019	84.47
2020	84.666
2021	84.88
2022	85.092
2023	85.307
2024	85.535
2025	85.78
2026	86.055
2027	86.342
2028	86.638
2029	86.941
2030	87.248