Year	% of GDP
1988	8.183869094302258
1989	6.056560593604587
1990	4.158161993219044
1991	4.782684862116587
1992	5.0012796823279
1993	3.4094693564786844
1994	3.2604729411373428
1995	3.4211650695658196
1996	4.064790641919711
1997	4.074959503696986
1998	2.148508739242524
1999	2.421025691534431
2000	2.2075827246454174
2001	2.196826136199734
2002	1.5029191061618727
2003	0.8525511377201521
2004	1.7290010133925202
2005	2.2097150266466365
2006	2.9969770608514716
2007	4.674816741039168
2008	4.147790552652579
2009	3.230424465206131
2010	4.822609064514422
2011	4.290383428091516
2012	2.8732344539260315
2013	2.582846333346368
2014	1.492896965632728
2015	1.9731148831971523
2016	2.3825017335760017