Year % of GDP 2005 12.724624819018418 2006 13.518893244967664 2007 17.805269309411333 2008 15.661094815128001 2009 15.178894586368221 2010 16.32873155910841 2011 16.393940960327786 2012 16.51935509540688 2013 16.349780060712224 2014 18.483419715264077 2015 18.57994939647827 2016 18.284150165422293 2017 18.20832691164309 2018 18.72657988266589 2019 19.167906395003172 2020 17.25278382181619 2021 17.94384964726424 2022 18.42115321835832