Year % of GDP 2000 21.934805231120606 2001 25.170680482738916 2002 24.86082656486956 2003 26.764684847906935 2004 26.305094733866618 2005 29.940594844941636 2006 19.108059488511632 2007 19.882207169015384 2008 22.21799021181105 2009 21.860551804577728 2010 22.09341170974276 2011 21.062791041726843 2012 21.09491912089888 2013 19.476898159424543 2014 19.37276202297218 2015 19.195887166330277 2016 19.61172532270028 2017 18.426267320231187 2018 18.504459451055407 2019 17.79790684864435 2020 22.60169683671429 2021 19.709367046099423 2022 17.85583703493136 2023 18.118580633364363