Year % of GDP 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0.0103677175607095 2005 0.0195425675565115 2006 0.0177881524248426 2007 0.0227668765867207 2008 0.0525767547664309 2009 0.0511686185788562 2010 0.0638161948318141 2011 0.0951786230834513 2012 0.137675372248078 2013 0.0896165354483561 2014 0.0891082785579314 2015 0.0345824404298269 2016 0.0190916739437906 2017 0.036360085832959 2018 0.0795369079908762 2019 0.0593681954347841 2020 0.0314235592999339 2021 0.0653994018600052