Year	Percent
1990	24.53
1991	24.646
1992	24.763
1993	24.88
1994	24.998
1995	25.115
1996	25.233
1997	25.352
1998	25.471
1999	25.59
2000	25.71
2001	25.83
2002	25.95
2003	26.071
2004	26.192
2005	26.313
2006	26.435
2007	26.557
2008	26.68
2009	27.37
2010	28.31
2011	26.937
2012	25.607
2013	24.32
2014	24.89
2015	25.47
2016	26.35
2017	26.306
2018	26.262
2019	26.218
2020	26.174
2021	26.13
2022	26.086
2023	26.041
2024	25.997
2025	25.953
2026	25.909
2027	25.865
2028	25.821
2029	25.777
2030	25.733