Year % of GDP 2008 20.196219879969924 2009 21.055308146617424 2010 18.837716108383006 2011 15.664414940881446 2012 15.342190522741477 2013 15.71409865056089 2014 15.534133988817075 2015 15.429475465851011 2016 14.75154966445639 2017 15.486907032651075 2018 15.684295283007716 2019 15.810534448400675 2020 18.609053263079815 2021 18.00697923393348 2022 17.24073745695698 2023 18.20210790050358