Year % of GDP 2000 4.71542597 2001 5.43839121 2002 5.28793621 2003 5.58143282 2004 5.11667967 2005 4.99094057 2006 4.63050652 2007 4.44609547 2008 4.20027018 2009 4.17732763 2010 5.37907028 2011 5.44257212 2012 5.47921467 2013 5.50909233 2014 5.87269926 2015 5.27965546 2016 5.12190151 2017 4.87493944 2018 4.84869289 2019 4.37567186 2020 5.92146206 2021 5.85133028