Year % of GDP 2009 38.333868160892585 2010 37.36357959594092 2011 37.5690227836114 2012 36.81416647354281 2013 32.25890624607249 2014 33.985621722614255 2015 31.527381028374453 2016 31.918991489723687 2017 32.790171225704796 2018 31.24133151215716 2019 28.34183246494384 2020 29.49593722640987 2021 35.755329998045546 2022 36.21711000241186 2023 28.611055523969302