Year Percent of GDP 2000 15.913 2001 14.852 2002 13.624 2003 11.83 2004 11.063 2005 11.963 2006 12.498 2007 13.438 2008 13.732 2009 14.781 2010 19.516 2011 19.304 2012 20.78 2013 20.44 2014 20.171 2015 20.66 2016 15.849 2017 16.388 2018 16.323 2019 16.173 2020 16.055 2021 16.113 2022 16.126 2023 16.12 2024 16.107