Year % of GDP 2009 39.266825414698545 2010 39.84518735277051 2011 42.60145360427294 2012 42.60303765224867 2013 41.65461888941183 2014 41.27629178030101 2015 39.13009430785849 2016 38.48086113289887 2017 37.059448784006676 2018 34.26581937941517 2019 35.58919672331289 2020 38.86088610458315 2021 37.8702095989132 2022 35.090049040193676 2023 33.92010266091151