Year	Percent
1990	78.271
1991	78.372
1992	78.478
1993	78.359
1994	78.471
1995	78.463
1996	78.498
1997	78.598
1998	78.696
1999	78.973
2000	79.207
2001	79.395
2002	79.551
2003	79.706
2004	79.893
2005	80.124
2006	80.433
2007	80.762
2008	81.102
2009	81.442
2010	81.774
2011	82.125
2012	82.454
2013	82.761
2014	82.318
2015	81.977
2016	81.568
2017	81.856
2018	82.136
2019	82.397
2020	82.633
2021	82.85
2022	83.044
2023	83.233
2024	83.439
2025	83.669
2026	83.92
2027	84.186
2028	84.455
2029	84.706
2030	84.931