Year Percent of GDP 2000 14.226 2001 10.94 2002 10.978 2003 9.184 2004 11.381 2005 10.999 2006 14.634 2007 18.029 2008 18.767 2009 22.184 2010 25.798 2011 25.04 2012 27.438 2013 27.091 2014 29.208 2015 31.819 2016 31.747 2017 28.235 2018 27.269 2019 28.963 2020 29.219 2021 28.952 2022 28.446 2023 28.965 2024 27.765