Year % of total taxes 1997 11.752968359386609 1998 12.22959058418393 1999 15.141784915818771 2000 16.113927729518522 2001 19.807619288697634 2002 17.43951612903226 2003 16.823835198590853 2004 17.240789973414355 2005 21.305413032037226 2006 23.40433858704509 2007 23.38575023005733 2008 21.703784467189777 2009 20.445794969976696 2010 20.997574287446938 2011 24.579154636958105 2012 24.950667843366684 2013 25.168674056436274 2014 27.32608050061711 2015 28.48869637991901 2016 28.91158295575236 2017 27.972383754756773 2018 28.61799545139243 2019 37.04671810345037 2020 39.78055183968612 2021 31.181339328838703