Year	% of GDP
1975	1.5644363830995944
1976	1.0780995825568942
1977	0.8501521803609435
1978	1.8785919177547787
1979	1.536263851736521
1980	1.343022319321779
1981	1.290759738031511
1982	1.2244165924616333
1983	1.360894700943257
1984	1.3203267680296453
1985	3.1521441192890487
1986	7.174953504927596
1987	9.57080227574613
1988	6.31869036915744
1989	10.809305904499054
1990	9.62163340575542
1991	9.727105801475673
1992	8.330101222564796
1993	12.139545259294346
1994	14.744004538816663
1995	13.194555736357943
1996	16.81088672678169
1997	27.08038366539628
1998	40.18179352331836
1999	48.4616714919654
2000	79.10588795973858
2001	71.19973537865111
2002	68.77172020575321
2003	59.79914148801861
2004	62.451146805473115
2005	57.873774058095776
2006	86.85825592788024
2007	108.83905275276953
2008	82.10672305517942
2009	47.54398816188458
2010	51.04268014866279
2011	46.41827161358608
2012	40.03757774122478
2013	39.31597996666071
2014	40.9185073788111
2015	54.45926102204734