Year % of GDP 1999 33.25109449291792 2000 31.73720651874545 2001 30.461156006355694 2002 27.385740558444926 2003 23.88579031921806 2004 33.147885519918106 2005 36.08228263826031 2006 28.90458924237793 2007 36.854455317895315 2008 29.879192301620332 2009 11.804585363974123 2010 17.935418913713384 2011 18.604991253005366 2012 25.447702263470816 2013 22.39166926982914 2014 24.12547897465428 2015 17.807041385371793 2016 19.571566856962505 2017 21.684712568523913 2018 20.43152960373296 2019 18.005573741163573 2020 21.544308546820233 2021 20.294627609187636 2022 18.528232124745962 2023 16.9991779640355