Year % of GDP 2005 32.61727345702437 2006 33.99303418643151 2007 36.073613217487534 2008 37.83100133893408 2009 39.824547883671315 2010 39.16334613189101 2011 38.118617945259366 2012 39.03266972431659 2013 37.3655580614393 2014 39.94627297672119 2015 36.4782077046437 2016 34.901023609268826 2017 33.889925287330236 2018 34.49934746617428 2019 34.05216892463546 2020 38.361465935567836 2021 34.85890441172907 2022 33.42377050909272