Year % of tax revenue 1995 2.3255813953488373 2002 2.016829102472092 2003 1.7316421844560916 2004 2.711377254596959 2005 3.5103056881648045 2006 3.83677042869326 2007 3.22917502626145 2008 3.172770561488637 2009 1.5605851045758197 2010 1.7335078115830789 2011 1.7402311927917666 2012 1.382829417190163 2013 1.337735111971958 2014 1.2201987554935512 2015 1.2445787317652308 2016 1.2014464828400802 2017 1.1394471240358737 2018 0.8637073235535331 2019 0.9728563079680406 2020 0.9996036528675845 2021 0.8923549144451302 2022 1.0795109426675331