Year	Percent
1990	65.534
1991	65.505
1992	65.481
1993	65.255
1994	65.263
1995	65.208
1996	65.152
1997	65.132
1998	65.129
1999	65.067
2000	65.003
2001	65.026
2002	65.028
2003	65.08
2004	65.263
2005	65.343
2006	65.296
2007	65.275
2008	65.254
2009	65.242
2010	65.299
2011	65.253
2012	65.277
2013	65.278
2014	65.292
2015	65.27
2016	65.184
2017	65.223
2018	65.266
2019	65.315
2020	65.37
2021	65.43
2022	65.496
2023	65.566
2024	65.642
2025	65.723
2026	65.808
2027	65.896
2028	65.989
2029	66.085
2030	66.185