Year	Percent
1990	55.467
1991	55.276
1992	55.375
1993	55.459
1994	55.522
1995	55.571
1996	55.722
1997	55.899
1998	56.1
1999	56.321
2000	56.552
2001	56.784
2002	56.516
2003	56.577
2004	58.275
2005	58.936
2006	58.901
2007	58.335
2008	58.835
2009	60.121
2010	59.586
2011	57.675
2012	57.993
2013	58.573
2014	61.408
2015	62.373
2016	61.025
2017	61.313
2018	61.618
2019	61.901
2020	62.138
2021	62.367
2022	62.554
2023	62.718
2024	62.884
2025	63.068
2026	63.283
2027	63.511
2028	63.742
2029	63.96
2030	64.158