Year	% of GDP
1980	-51.5736119775421
1981	-42.6515823720793
1982	-35.6726796624963
1983	-34.2384105960265
1984	-9.77137305699482
1985	4.79729729729728
1986	7.3289966489257
1987	11.5382725527831
1988	7.17630370170223
1989	5.22329870433058
1990	2.82636677863784
1991	-5.93146699656796
1992	-5.27942807798334
1993	-12.596761683698
1994	-1.47439571362765
2006	-17.1009988064515
2007	9.00211309423094
2008	-4.71967204179765
2009	9.89921563168043
2010	12.1410799264751
2011	5.29025952215688
2012	11.7630806072443
2013	15.4274523739063
2014	14.7415908522215
2015	9.1477590761289
2016	-1.14801789360475
2017	-4.61970301729138