Year Percent of GDP 1997 25.044 1998 24.307 1999 19.396 2000 24.1 2001 21.093 2002 18.048 2003 19.353 2004 18.885 2005 19.669 2006 14.95 2007 13.442 2008 10.866 2009 13.406 2010 13.793 2011 14.619 2012 14.663 2013 16.876 2014 17.011 2015 17.313 2016 14.117 2017 17.729 2018 13.508 2019 14.378 2020 14.197 2021 13.946 2022 13.983 2023 13.509 2024 13.299