Year	% of GDP
1975	0.8770186996884791
1976	0.9294950189980347
1977	0.7484315639514644
1978	0.7140985742182407
1979	0.9078844971083679
1980	0.6091099709295021
1981	0.5931632678710763
1982	1.123155000248016
1983	1.508942458276686
1984	1.7308195945975884
1985	2.563399208075449
1986	4.000423692019502
1987	5.388086687835124
1988	5.075813614154745
1989	5.171760662389956
1990	3.548350448879644
1991	3.211727662198474
1992	3.3097986657049145
1993	4.697528322384852
1994	5.305488774219223
1995	5.275989569056069
1996	7.8357047624425356
1997	11.264801354743275
1998	22.80635851533678
1999	19.57913858605305
2000	16.294509524958848
2001	15.95620513348322
2002	14.771730904088795
2003	13.001496873835217
2004	20.34187356809435
2005	27.61696736317037
2006	33.12926143119181
2007	49.173672739201265
2008	36.8654601312627
2009	25.501842999107005
2010	22.31271301564973
2011	19.72949193249872
2012	20.341599148897775
2013	22.098282000007977
2014	20.03170023914426