Year % of GDP 1990 3.73157855500742 1991 2.04969945698757 1992 2.16776430055131 1993 2.46708564423504 1994 1.74109759609166 1995 2.95980522131581 1996 3.209285723044 1997 2.3219845290823 1998 0.74227607189078 1999 1.73054268013785 2000 5.40046980305752 2001 4.19019187872677 2002 4.39304141489731 2003 5.07436940546078 2004 5.07540795828882 2005 5.37160292421135 2006 4.34214617853328 2007 4.11571314211123 2008 4.39931830334527 2009 1.45083569447794 2010 1.36556852378151 2011 2.07023379383746 2012 2.00160011940789 2013 1.81098984495042 2014 1.40801898329424 2015 0.526675674638226 2016 0.356801760612992 2017 0.661950141993753 2018 1.12073426200572 2019 0.819211930906664 2020 0.395640310697318 2021 0.867176370586835