Year	Percent
1990	24.69
1991	25.023
1992	25.219
1993	25.413
1994	25.77
1995	25.996
1996	26.2
1997	28.3
1998	24.8
1999	25.41
2000	26.031
2001	26.66
2002	27.3
2003	28.2
2004	30.643
2005	33.2
2006	29.4
2007	27.993
2008	26.627
2009	25.305
2010	22.25
2011	23.73
2012	23.81
2013	23.21
2014	23.68
2015	27.31
2016	30.88
2017	30.307
2018	29.733
2019	29.16
2020	28.587
2021	28.014
2022	27.44
2023	26.867
2024	26.294
2025	25.72
2026	25.147
2027	24.574
2028	24.001
2029	23.427
2030	22.854