Year	Percent
1990	73.515
1991	73.546
1992	73.576
1993	73.616
1994	73.653
1995	73.696
1996	73.748
1997	73.794
1998	73.836
1999	73.872
2000	73.902
2001	74
2002	74.109
2003	74.233
2004	74.372
2005	74.522
2006	74.676
2007	74.839
2008	75.007
2009	75.177
2010	75.347
2011	75.516
2012	75.673
2013	75.822
2014	75.904
2015	75.989
2016	76.09
2017	76.273
2018	76.452
2019	76.619
2020	76.769
2021	76.907
2022	77.034
2023	77.149
2024	77.253
2025	77.346
2026	77.429
2027	77.505
2028	77.58
2029	77.667
2030	77.773