Year % of GDP 2008 42.51913485047672 2009 44.035761846234536 2010 48.03147313823582 2011 50.257641900289336 2012 51.34308558604453 2013 55.050402524094594 2014 56.807323531732074 2015 54.79152745280929 2016 55.73168297049062 2017 54.8445778265936 2018 51.349471486416824 2019 49.36969035775003 2020 55.345352661794756 2021 52.199933263997714 2022 43.34059623967439 2023 44.18972672042683