Year	% of GDP
1988	3.98708990791726
1989	3.60855043357025
1990	4.95025103709506
1991	5.78673213978079
1992	6.60649860820425
1993	7.71002653464257
1994	6.3720408439004
1995	7.58243358096319
1996	8.91148322331507
1997	13.08782186553
1998	17.8415228666769
1999	13.4306597232857
2000	12.8215298453111
2001	8.55204840082121
2002	10.1241665634452
2003	7.49106174905135
2004	5.1036672117543
2005	6.12498417210355
2006	6.1783675564083
2007	6.71299088657941
2008	7.45578537098238
2009	6.97363344431825
2010	7.12200578479571
2011	8.42945627341868
2012	7.83163894685634
2013	7.74879427435323
2014	8.5711172355742
2015	7.8551358964339
2016	7.72763275773916
2017	7.50122018825601