Year % of GDP 1994 34.19765145449693 1995 19.826965976192707 1996 15.807941154944011 1997 16.22137225722699 1998 18.767848631052722 1999 19.009541469100157 2008 18.507768354543913 2009 23.07880285943008 2010 20.87248322147651 2011 18.478361046042778 2012 22.185383888922377 2013 20.925543982675055 2014 22.10098942456125 2015 24.78870908422214 2016 27.195938118533324 2017 27.958730582986675 2018 21.402262398242023 2019 24.284337979051532 2020 33.93147657488967 2021 27.14441349653231