Year Percent of GDP 1999 23.433 2000 27.8 2001 29.241 2002 40.794 2003 37.838 2004 32.82 2005 28.223 2006 25.507 2007 22.663 2008 22.476 2009 26.297 2010 28.539 2011 27.22 2012 24.817 2013 26.883 2014 32.919 2015 42.081 2016 38.611 2017 38.979 2018 40.614 2019 40.78 2020 39.616 2021 38.127 2022 36.832 2023 35.585 2024 33.917