Year	Percent
1990	65.546
1991	65.469
1992	65.397
1993	65.342
1994	65.295
1995	65.278
1996	65.239
1997	65.219
1998	65.2
1999	65.191
2000	65.175
2001	65.158
2002	65.156
2003	65.128
2004	65.111
2005	65.101
2006	65.092
2007	65.081
2008	65.097
2009	65.075
2010	65.072
2011	65.086
2012	65.105
2013	65.116
2014	65.118
2015	65.125
2016	65.181
2017	65.226
2018	65.274
2019	65.323
2020	65.372
2021	65.426
2022	65.481
2023	65.537
2024	65.597
2025	65.661
2026	65.733
2027	65.808
2028	65.887
2029	65.968
2030	66.05