Year % of GDP 1990 11.371103249271519 1991 12.116802057522817 1992 12.532150573280445 1993 12.445059946102822 1994 12.042397635247406 1995 10.972076070213967 1996 11.156755549212221 2006 6.023568086604977 2007 5.943176413118502 2008 8.004029973766661 2009 19.251781868566834 2010 21.88629705257225 2011 21.07436228229865 2012 20.62318078510921 2013 19.016381288717472 2014 18.325733607477225 2015 19.08697767360196 2016 15.804952313986862 2017 14.680769175866534 2018 15.230715144260945 2019 16.193904309717993 2020 19.61608145621009