Year Percent of GDP 2001 9.308 2002 9.958 2003 13.719 2004 16.156 2005 25.68 2006 33.712 2007 36.745 2008 30.564 2009 18.602 2010 13.302 2011 13.824 2012 14.701 2013 14.057 2014 19.615 2015 25.125 2016 21.618 2017 18.967 2018 15.79 2019 13.823 2020 12.994 2021 12.543 2022 12.145 2023 11.763 2024 11.391