Year % of GDP 2004 23.41260483248263 2005 23.652270342560424 2006 24.025289906587975 2007 24.490736985527093 2008 24.36159213501397 2009 23.55534181200671 2010 24.268608243652913 2011 24.186061426564255 2012 24.12292915051871 2013 24.1185924062819 2014 24.447898756909627 2015 24.22310007978594 2016 23.726130202969593 2017 23.915464378314415 2018 23.934139254506423 2019 23.161492249460697 2020 23.053517543932067 2021 24.18911573278228 2022 23.609019578859794 2023 22.75269317333206