Year % of GDP 1995 6.708623880446801 1996 6.31070074168785 1997 6.092239831181532 1998 5.411504002694056 1999 4.642330748143796 2000 4.355370755962236 2001 4.567478475586344 2002 4.052456282997116 2003 3.910050006280604 2004 4.349931045785089 2005 3.687585030550966 2006 3.4854850582339747 2007 3.321765805423306 2008 3.282184280785551 2009 3.046408522759019 2010 2.9807410968588743 2011 3.422295915828276 2012 3.178240114701348 2013 3.43049243407466 2014 3.3053593722667722 2015 2.950366597516492 2016 2.9574497516083764 2017 3.0994149577474963 2018 2.8331202462966454 2019 2.746934057755445 2020 2.836654610106132 2021 2.836279392270332 2022 2.904823017332512 2023 2.9839241207599145