Year	Percent
1990	65.146
1991	65.37
1992	65.726
1993	66.82
1994	65.892
1995	65.372
1996	64.629
1997	63.547
1998	63.545
1999	63.216
2000	63.111
2001	63.271
2002	63.38
2003	63.096
2004	63.014
2005	63.014
2006	62.939
2007	63.478
2008	64.014
2009	64.546
2010	65.075
2011	65.6
2012	65.407
2013	65.24
2014	64.899
2015	64.546
2016	64.19
2017	64.392
2018	64.595
2019	64.797
2020	64.999
2021	65.202
2022	65.404
2023	65.607
2024	65.809
2025	66.011
2026	66.214
2027	66.416
2028	66.619
2029	66.821
2030	67.023