Year	% of GDP
1972	4.028103044496487
1973	2.058542517154521
1974	0.6525390877374337
1975	1.6768117606523487
1976	2.431453698913606
1977	6.838815639399607
1978	5.547727364225613
1979	5.5509924709103355
1980	3.8271430588899875
1981	3.683325324363287
1982	4.928815252685038
1984	4.110785353377831
1985	4.806007152729293
1986	6.695156695156696
1987	5.014125172675569
1988	3.7745652726139065
1989	4.292015558035016
1990	5.413426777739767
1991	5.178405160947061
1992	3.3679172321207083
1993	3.570892723180795
1994	2.2575219112420797
1995	3.796080179218616
1996	4.557779957306871
1997	3.49599449079038
1998	0.4925989326351828
1999	1.6152382072178662
2000	0.3713468372665068
2001	4.194806340246453
2002	1.401772579723536
2003	2.9118089401015457
2004	1.3859958546287834
2005	0.5679348475078216
2006	-1.238520681350287
2007	-0.6056412878901825
2008	-0.8931995976350202
2009	0.21320035720859212
2010	0.21363967619905838
2011	1.9398587690708988
2012	2.588662607770724