Year	Percent
1990	62.57
1991	62.483
1992	62.803
1993	62.854
1994	63.15
1995	63.659
1996	64.849
1997	66.766
1998	67.653
1999	68.467
2000	69.081
2001	70.016
2002	70.536
2003	70.933
2004	71.515
2005	71.831
2006	72.168
2007	72.61
2008	73.038
2009	73.245
2010	73.328
2011	73.55
2012	73.881
2013	74.057
2014	74.26
2015	74.366
2016	74.256
2017	74.473
2018	74.692
2019	74.92
2020	75.16
2021	75.396
2022	75.64
2023	75.89
2024	76.139
2025	76.389
2026	76.621
2027	76.846
2028	77.065
2029	77.278
2030	77.487