Year % of GDP 1987 1.83104061867374 1988 1.18170353093632 1989 1.70639084452163 1990 2.29357782835182 1991 1.28822981550087 1992 1.56374472534785 1993 1.40427200203448 1994 1.13809830972109 1995 1.00099144053812 1996 1.42614316633189 1997 1.14873206278261 1998 0.298065348562516 1999 0.981639514434116 2000 2.05194073825512 2001 1.38020102615678 2002 1.23167374745268 2003 1.11571675681484 2004 1.1236125349855 2005 1.19701667171786 2006 1.03069280818371 2007 0.811152284107306 2008 0.909321004650877 2009 0.572798400996102 2010 0.651277335844004 2011 0.928598823680941 2012 0.944058149450528 2013 0.818028540119226 2014 0.710972260249342 2015 0.33486139473849 2016 0.237281273734058 2017 0.306819119328612 2018 0.417895750376407 2019 0.356049741091749 2020 0.18364537995674 2021 0.378228984068352