Year % of GDP 1970 0 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 0.000300183379616858 1989 0.000452448894464279 1990 0.000578576008430695 1991 0 1992 0.027459715250273 1993 0.0302548152341097 1994 0.0654345154290398 1995 0.128619001646594 1996 0 1997 0.0287402582201248 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0.0123903278170218 2004 0 2005 0 2006 0.00907627499073501 2007 0 2008 0.110068813260895 2009 0.240205141462773 2010 0.0937491381749339 2011 0.654511620365384 2012 0.530274437341492 2013 0.368977123492966 2014 0.351420911174992 2015 0.361552777361383 2016 0.559881099662443 2017 0.400849571195147 2018 0.455348393491403 2019 0.574500241538047 2020 0.724356662445554 2021 2.50107699952363