Year	%
1995	25.95
1999	25.83
2000	25.83
2001	25.83
2003	28.17
2004	28.06
2005	28.04
2006	28.03
2007	28.01
2008	27.91
2009	27.89
2010	27.89
2011	27.88
2013	27.51
2014	27.45
2015	25.27
2021	25.39