Year	Percent
1990	64.23
1991	65.034
1992	65.417
1993	65.192
1994	65.288
1995	65.242
1996	65.703
1997	66.66
1998	66.582
1999	66.464
2000	66.511
2001	67.291
2002	67.369
2003	67.79
2004	68.018
2005	68.742
2006	69.32
2007	70.039
2008	70.34
2009	71.225
2010	71.557
2011	71.569
2012	72.218
2013	73.597
2014	74.51
2015	75.203
2016	76.234
2017	76.483
2018	76.734
2019	76.985
2020	77.236
2021	77.486
2022	77.734
2023	77.981
2024	78.224
2025	78.461
2026	78.692
2027	78.913
2028	79.126
2029	79.336
2030	79.548