Year	% of GDP
1970	5.48772130601331
1971	7.38794104909662
1972	7.19271915747182
1973	10.7554427076038
1974	33.9478841729493
1975	24.8915014056924
1976	22.9931513860828
1977	16.1985343555775
1978	15.8263995123574
1979	36.481380981255
1980	34.4312946645093
1981	24.750858904318
1982	13.1086608763643
1983	17.0995109701258
1984	19.0260300794035
1985	16.3107385078032
1986	8.00102414924425
1987	15.9166311155573
1988	10.0130859589153
1989	20.9626504331607
1990	29.2548511239111
1991	16.6639894189064
1992	15.7571776112482
1993	15.7932181812518
1994	16.2198265911409
1995	15.1363210095652
1996	23.8367720643582
1997	18.0963540802062
1998	9.06347009522954
1999	13.269532614572
2000	20.5761295010598
2001	15.3442903568827
2002	19.4545884689745
2003	21.8955843439596
2004	23.8297115705399
2005	29.2230041014033
2006	28.0774680117788
2007	23.1186941835454
2008	23.9223070628002
2009	10.5416668243022
2010	12.380878328857
2011	24.4753357613612
2012	18.7812359044725
2013	17.6253449138361
2014	11.8465082797294