Year	% of GDP
1974	2.887454430175758
1975	3.9020119856339277
1976	4.144352734753805
1977	3.830864409299093
1978	4.4004080833017065
1979	4.189793374142065
1980	5.023021842206164
1981	4.552149904254726
1982	4.767804618642821
1983	4.645134000367787
1984	4.9697002181649506
1985	5.54872010443318
1986	5.620576098076517
1987	4.626591053695299
1988	4.402801460534975
1989	4.588693947852939
1990	4.230274358467756
1991	3.1650688091725727
1992	2.8654908796136707
1993	3.1216023344194914
1994	2.999503511516727
1995	2.9206624072160543
1996	2.743372652312081
1997	2.0697034072850626
1998	1.8858577190704855
1999	2.0140710128794543
2000	1.5509239650410698
2001	1.6326148356950767
2002	0.40014221461911825
2003	-0.5534407586466311
2004	1.8642439463774023
2005	1.0389786564323333
2006	0.14363179547056726
2007	1.7850792511415094
2008	-0.34870273178323835
2009	0.6953373101402914
2010	0.9351923620107089
2011	0.7713766528985201
2012	0.7142991391507284
2013	1.138467565393655
2014	0.6037550190346865
2015	0.9439746627333715
2016	0.7686041058034865
2017	0.8712734401329287
2018	0.7319387660455421