Year % of GDP 2005 6.854688880181382 2006 5.105040871643385 2007 4.892958236453823 2008 6.811670548142285 2009 5.276863855660652 2010 5.493949903849204 2011 5.196467154651415 2012 4.240532487080215 2013 4.676878196423681 2014 5.596835360454647 2015 5.40624867538668 2016 5.969125514451639 2017 6.241941910765394 2018 20.794358939294582 2019 20.290560296164305 2020 22.71969257396796 2021 23.391948534197727