Year Percent of GDP 2002 6.943 2003 11.927 2004 15.069 2005 15.698 2006 18.303 2007 21.478 2008 20.918 2009 21.17 2010 20.801 2011 21.937 2012 25.028 2013 24.977 2014 25.402 2015 25.947 2016 25.997 2017 25.878 2018 27.114 2019 26.828 2020 29.083 2021 30.149 2022 31.327 2023 32.732 2024 32.688