Year	% of GDP
1970	0
1971	0
1972	0
1973	0
1974	4.3719597268681
1975	4.27445104763453
1976	1.1499909561091
1977	3.0113370013794
1978	0.0549540866566685
1979	0.112634550409704
1980	0.768060048937294
1981	1.09623767866998
1982	0.610219940336046
1983	0.410657303051468
1984	0
1985	0.194383652491627
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0.344275496609694
2007	0.665819788669085
2008	5.56343584497924
2009	3.78076992202376
2010	1.59448845503621
2011	3.23812474004959
2012	2.83151788537621
2013	1.21570558402378
2014	1.12539623666435
2015	1.34277468078016
2016	1.08501452274872
2017	0.820805589760864
2018	0.681456401290935
2019	0
2020	0
2021	0