Year % of total taxes 1990 28.10126582278481 1991 32.36822568671121 1992 31.506849315068493 1993 30.08298755186722 1994 33.65695792880259 1995 30.121951219512194 1996 31.298992161254198 1997 31.589849818746764 1998 34.12921348314607 1999 32.340815391662844 2000 31.411951813157362 2001 29.328559009810824 2002 32.20356998863762 2003 28.255030601910967 2004 27.63360982870579 2005 29.078087664881597 2006 27.314304401778344 2007 25.72688006571566 2008 24.6434573570867 2009 25.508880852420106 2010 25.81658813554551 2011 27.75715529959757 2012 28.429339825301753 2013 26.493538882459074 2014 29.90049538776905 2015 26.95232949586468 2016 29.104798192039745 2017 27.827866585541233