Year	Percent
1990	24.161
1991	24.2
1992	24.244
1993	24.322
1994	24.417
1995	24.69
1996	24.988
1997	25.315
1998	25.38
1999	25.455
2000	25.54
2001	25.633
2002	25.742
2003	25.871
2004	26.021
2005	26.196
2006	26.796
2007	27.407
2008	27.74
2009	26.944
2010	26.905
2011	27.008
2012	27.935
2013	27.766
2014	27.581
2015	27.39
2016	27.172
2017	27.137
2018	27.085
2019	27.015
2020	26.925
2021	26.825
2022	26.707
2023	26.571
2024	26.421
2025	26.257
2026	26.092
2027	25.913
2028	25.737
2029	25.584
2030	25.47