Year	Percent
1990	48.928
1991	49.734
1992	50.756
1993	52.884
1994	55.721
1995	54.327
1996	53.498
1997	54.469
1998	57.071
1999	58.154
2000	58.331
2001	58.503
2002	58.667
2003	60.019
2004	57.638
2005	58.619
2006	59.593
2007	60.578
2008	60.779
2009	60.96
2010	60.489
2011	61.156
2012	61.815
2013	62.962
2014	62.49
2015	62.013
2016	61.532
2017	61.763
2018	61.994
2019	62.228
2020	62.469
2021	62.715
2022	62.966
2023	63.223
2024	63.49
2025	63.767
2026	64.054
2027	64.352
2028	64.657
2029	64.963
2030	65.266