Year % of GDP 2008 29.764453235089672 2009 30.735137341947976 2010 31.011190799282556 2011 31.158163121962186 2012 30.69589104145396 2013 29.161155294112078 2014 27.504805078594842 2015 28.267085481642802 2016 28.01159663033182 2017 29.95952461560341 2018 31.711269439157874 2019 31.04263898329009 2020 29.706190647353463 2021 32.88072506793585 2022 32.504808207356184 2023 31.58909104867822