Year % of GDP 2001 22.826755723799163 2002 21.721676360924175 2003 26.90566407564282 2004 26.781393487829497 2005 28.447782310140585 2006 32.339882714270004 2007 33.302963398606664 2008 32.192305194232986 2009 30.05040386249192 2010 28.64675566361019 2011 28.761819551017197 2012 32.45476818866092 2013 33.378621986655894 2014 33.683646389864954 2015 35.36674913595855 2016 35.79185820366586 2017 35.24801442458738 2018 35.10613695781974 2019 34.11430788887014 2020 35.908687315753184 2021 35.88810552025553 2022 36.88205866703223 2023 37.98510139750411