Year % of GDP 2006 33.7543452813693 2007 37.3765470838216 2008 40.6775809618278 2009 44.8911568997515 2010 44.3188591419986 2011 45.9059854222516 2012 46.2079610660566 2013 47.7809980893051 2014 49.6354741206952 2015 52.4967361425338 2016 56.9201598071558 2017 60.0834343954462 2018 61.7161941237452 2019 62.5423979273308 2020 66.2593872572307 2021 66.1822832118739 2022 66.8591570537634 2023 61.825545131515