Year Percent of GDP (Units) 2009 44.767 2010 34.774 2011 33.343 2012 30.857 2013 30.182 2014 32.430 2015 31.413 2016 30.395 2017 30.070 2018 28.178 2019 28.334 2020 33.034 2021 30.830 2022 29.055 2023 28.187