Year % of GDP 1990 0.0241546688775384 1991 0.0185752326970374 1992 0.0144138022143178 1993 0.0143009433982058 1994 0.0125335992840751 1995 0.0137249404827816 1996 0.0239398023552188 1997 0.0158931801493376 1998 0.00507702640106989 1999 0.0159526982087267 2000 0.0350742549672057 2001 0.02445812874736 2002 0.0304619403231985 2003 0.0351709363162619 2004 0.0383298465371606 2005 0.0508088454131561 2006 0.0436075630517138 2007 0.0367473553909014 2008 0.0429704222612688 2009 0.0244055189347667 2010 0.0217719950834572 2011 0.0306168472969245 2012 0.0305352758913579 2013 0.0274970082447114 2014 0.0252681890510458 2015 0.0102914811209634 2016 0.00692491287997829 2017 0.00881622275858796 2018 0.0125584051035841 2019 0.0083220468689857 2020 0.00507207922757448 2021 0.00965696429550218