Year	Percent
1990	80.572
1991	80.626
1992	80.744
1993	80.936
1994	80.898
1995	80.784
1996	80.595
1997	80.816
1998	80.915
1999	81.036
2000	79.863
2001	84.81
2002	83.014
2003	80.865
2004	78.213
2005	79.366
2006	80.471
2007	81.506
2008	82.482
2009	83.411
2010	84.295
2011	84.029
2012	83.761
2013	83.51
2014	83.319
2015	83.176
2016	83.076
2017	83.409
2018	83.759
2019	84.085
2020	84.359
2021	84.59
2022	84.769
2023	84.915
2024	85.061
2025	85.226
2026	85.41
2027	85.609
2028	85.817
2029	86.022
2030	86.219