Year % of GDP 1975 3.6696574484719053 1976 4.555119475011559 1977 4.732883613720707 1978 6.412980094786039 1993 2.0187117311046285 1994 3.9016467013107383 1995 9.50194313344794 1996 14.13943858286448 1997 13.326335573438453 1998 13.514397116845018 1999 19.17200452267644 2000 24.350072222938383 2001 5.817554147407879 2002 9.143156213471318 2003 17.93885479610062 2004 22.41614935673063 2005 16.09179770800505 2006 13.636773719097855 2007 12.542817289211241 2008 11.813833773373347 2009 14.213247536112378 2010 17.797897361566047 2011 17.103336002215784 2012 14.128995727545894 2013 70.16919132333015 2014 25.33510204083259 2015 21.90720481496174 2016 22.056334139051028 2017 21.850064291095965 2018 51.702939121979504 2019 137.02364953189968 2020 642.1931274759995 2021 420.00623713431366 2022 390.19495571768636