Year % of GDP 1977 0.10342490279573543 1978 0 1979 0 1980 0 1981 0 1982 0 1983 0 1984 0 1985 0 1986 0 1987 0 1988 0 1989 0 1992 0.0015806896941716053 1993 0.0386695728163876 1994 0.24236682670566123 1995 0.18000802814824177 1996 0.25030773274136947 1997 3.276977220326617 1998 3.2529774436256833 1999 0.8866113603200823 2000 1.6335147893774387 2001 4.244759584308511 2002 3.2480726995032017 2003 5.392122512523153 2004 5.380415798596247 2005 2.137800937295584 2006 3.568235274162409 2007 1.1264709251968568 2008 0.40099713413269156 2009 0.6827293669344301 2010 0.9630306253599366 2011 1.9673566390525439 2012 0.643172898229037 2013 2.8204084585716207 2014 3.3356911106881486 2015 4.066488965364531 2016 5.57620321707488 2017 4.912701476776028 2018 3.9877197163417497 2019 2.657360161384564 2020 2.225385750666465 2021 3.828306408290974 2022 2.8949381404243884