Year	Percent
1990	69.923
1991	69.698
1992	69.497
1993	69.522
1994	69.508
1995	71.232
1996	72.873
1997	74.43
1998	75.903
1999	77.297
2000	78.9
2001	80.419
2002	81.851
2003	83.193
2004	84.444
2005	85.606
2006	85.564
2007	85.515
2008	85.461
2009	85.402
2010	85.344
2011	85.29
2012	85.237
2013	85.183
2014	85.686
2015	86.176
2016	86.579
2017	86.783
2018	86.985
2019	87.185
2020	87.384
2021	87.583
2022	87.779
2023	87.975
2024	88.172
2025	88.371
2026	88.573
2027	88.778
2028	88.983
2029	89.185
2030	89.38