Year	% of GDP
1974	8.181120885497982
1975	9.02450290812779
1976	9.181837990532085
1977	8.597094206364313
1978	9.302274530271317
1979	9.689048923165695
1980	9.026071738655018
1981	9.213690314790972
1982	9.269121351611554
1983	9.268497406185787
1984	9.306539864384536
1985	10.075418542810386
1986	10.427308859273843
1987	10.408309965737653
1988	10.356738010318942
1989	10.46834451421383
1990	9.993591396102849
1991	10.170922420125288
1992	9.805228442221049
1993	8.535233620035712
1994	8.981772016479294
1995	9.22682469090603
1996	9.231468690892676
1997	9.008577732693814
1998	8.11314351097825
1999	8.638300027570784
2000	8.810143496363077
2001	8.079454444569574
2002	8.67627393090217
2003	9.108084322144034
2004	9.570817080509752
2005	10.080931526353757
2006	11.129337053977947
2007	12.108346990414923
2008	10.97717215222231
2009	9.809725406388042
2010	10.388039790531213
2011	10.177387199757549
2012	10.83677172096602
2013	11.001625694292409
2014	9.984654190709442
2015	10.569709051974524
2016	11.14773841837394
2017	11.38744397981246
2018	12.017427748319296