Year % of GDP 1990 18.447753850148324 1991 13.365567336275708 1992 10.878995158746479 1993 8.186243536700388 1994 5.693219737116741 1995 4.610094712318387 1996 3.6734974574246904 1997 4.641520409484726 1998 10.66985738542137 1999 20.005778915559773 2000 21.964586513919627 2001 24.578334035858926 2002 30.070356272157166 2003 27.046018372080617 2004 24.39639980087089 2005 25.458128278076924 2006 24.38065914946521 2007 22.993466831917537 2008 22.450217262328795 2009 26.779195203644562 2010 26.900845543726515 2011 28.131976300687384 2012 28.444716023882805 2013 40.06185328898028 2014 36.496651324111674 2015 37.86886741931447 2016 38.48944057974809 2018 39.2491659155983 2019 40.140373117122245 2020 50.322781499941485 2021 58.479599886611645 2022 60.34985767937248