Year	Percent
1990	66.801
1991	67.082
1992	67.315
1993	67.159
1994	67.767
1995	69.024
1996	69.023
1997	69.315
1998	69.314
1999	69.378
2000	70.467
2001	71.143
2002	71.584
2003	72.504
2004	71.861
2005	73.681
2006	74.209
2007	74.778
2008	75.391
2009	75.553
2010	75.151
2011	75.639
2012	75.554
2013	75.792
2014	75.855
2015	76.548
2016	76.845
2017	77.057
2018	77.27
2019	77.485
2020	77.706
2021	77.932
2022	78.164
2023	78.4
2024	78.64
2025	78.881
2026	79.123
2027	79.365
2028	79.605
2029	79.845
2030	80.087