Year % of GDP 1993 24.41941740581785 1994 24.72163311973769 1995 15.599971662521265 1996 18.415080036039512 1997 18.908679099184948 1998 8.712718436087382 1999 11.12810986371057 2000 6.658906530324325 2001 5.047474169938349 2004 34.48570016474179 2005 31.208407463025516 2006 27.742074276763105 2007 37.85981352263708 2008 11.549756205590379 2009 17.021115198219245 2010 19.321464625183488 2011 14.123948518744415 2018 15.585262607433362 2019 15.75581099662116 2020 16.73576032032097 2021 12.365722072654446 2022 7.661372069057544