Year	Percent
1990	62.469
1991	62.48
1992	62.659
1993	62.839
1994	63.022
1995	63.206
1996	63.365
1997	63.522
1998	63.682
1999	63.848
2000	64.024
2001	64.207
2002	64.397
2003	64.59
2004	64.78
2005	64.964
2006	65.151
2007	65.33
2008	65.506
2009	65.687
2010	65.876
2011	66.08
2012	66.29
2013	66.33
2014	66.378
2015	66.42
2016	66.454
2017	66.579
2018	66.703
2019	66.833
2020	66.969
2021	67.106
2022	67.247
2023	67.393
2024	67.545
2025	67.701
2026	67.86
2027	68.023
2028	68.187
2029	68.35
2030	68.51