Year % of GDP 2005 26.293445584071556 2006 22.618897600197986 2007 23.486691493277338 2008 22.3460239484168 2009 22.885712960605908 2010 24.349535875541086 2011 21.86660089685903 2012 13.524041358469702 2013 15.158077021681477 2014 20.94470332245987 2015 27.055998245628754 2016 23.18458260661802 2017 9.47998187583666 2018 5.756926122628063 2019 4.883105789481446 2020 14.743405412256658 2021 11.743388196534902