Year % of GDP 1975 0.2955024392588468 1976 0.440818013710796 1977 0.2506199658615158 1978 0.5756829721056052 1993 0.33251953568925785 1994 0.60202004934602 1995 0.5751550022468417 1996 1.5490357921259403 1997 0.8446252334561875 1998 0.7903830216350842 1999 1.5591077424569963 2000 4.070171082726538 2001 1.235273831393149 2002 1.353604699374427 2003 2.5484361819068706 2004 5.92374583282918 2005 3.178543622582284 2006 1.7701837272068934 2007 2.328484826280469 2008 3.5451922428640628 2009 4.079856231014427 2010 3.4894914153125693 2011 2.301320552983486 2012 2.338596197744427 2013 8.991080933933468 2014 5.075335228074731 2015 2.06872679188135 2016 4.081018061506333 2017 2.4128521973348884 2018 10.572682067765607 2019 34.64077640656859 2020 73.54207021810207 2021 66.64984710806247 2022 57.317572258771065