Year % of GDP 2010 94.6761329899746 2011 80.1767267899356 2012 64.6903195541235 2013 58.2311054415115 2014 51.3379397660236 2015 48.3067684090502 2016 46.7023321289815 2017 42.1205811513623 2018 36.6061690724795 2019 34.5436995134477 2020 33.7103333164837 2021 31.4162984289872 2022 29.1432957381258 2023 28.0087899171727