Year % of GDP 1971 0 1972 0 1973 0 1974 0 1975 0 1976 0 1977 0 1978 0 1979 0 1980 0 1981 0 1982 0 1983 0 1984 0 1985 0 1986 0 1987 0 1988 0 1989 0 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0 2005 0 2006 0 2007 0 2008 0.241718443242608 2009 0.136614559984771 2010 0.0252340770771501 2011 0.0519123138385869 2012 0.0462955853539498 2013 0.0404742289870495 2014 0.0340990650048295 2015 0 2016 0.00769475794674993 2017 0.0128520280376942 2018 0.0215824227322452 2019 0.0178636683851291 2020 0.0084343580954292 2021 0.0205645534300319