Year	% of GDP
1973	1.740726529630599
1974	1.410826391242182
1975	2.959651318713048
1976	2.712206993950755
1977	4.0904602588517776
1978	3.780987483493039
1979	3.0815463222337787
1980	2.8930925709541975
1981	3.239756917763867
1982	2.472467318908355
1983	2.0301754523649067
1984	1.5783313214207475
1985	2.517553576911781
1986	2.0931375301759876
1987	2.3533362656789643
1988	2.466184859601351
1989	3.015538341837021
1990	3.5022869588767427
1991	3.496989245175953
1992	3.90753815372696
1993	3.505213066840831
1994	3.501683138604841
1995	3.175195068786791
1996	2.9516096215362246
1997	3.1156472113518365
1998	1.9114598445432591
1999	1.1391433104391744
2000	1.5613631551234752
2001	2.6945411144720435
2002	2.9262277290018472
2003	3.797035587583502
2004	3.201411502636949
2005	2.3963446757788494
2006	2.2334096109839816
2007	1.7493760065200954
2008	1.815242705467645
2009	2.1481306297042733
2010	3.039645145263787
2011	3.3432633594135135
2012	3.4781145549332084
2013	3.74908388997671
2014	2.962400493566895
2015	0.8859541593021266
2016	1.3940340020553148