Year % of GDP 2002 41.50784883939374 2003 42.953180730507015 2004 41.61349196547418 2005 31.95280962477097 2006 29.04693899560118 2007 30.980987089357782 2008 28.795986002851272 2009 42.212086368755294 2010 35.79775297530361 2011 33.98239891240233 2012 35.40962539724089 2013 37.55284196958182 2014 44.46674600748304 2015 52.74399652308328 2016 56.02579886540825 2017 57.18249797555025 2018 56.36146563360908 2019 49.93691319038053 2020 54.04846359478134 2021 44.83075412687474 2022 46.883524841025974 2023 53.81427219730321