Year	% of GDP
1985	47.8012536709094
1986	54.6128093764673
1987	44.0382460722379
1988	39.2030895868409
1989	43.0328197433597
1990	36.8051603254307
1991	68.6699105605817
1992	53.0880074499675
1993	36.2374556363728
1994	36.6706133375559
1995	29.4170476667943
1996	19.3857861438144
1997	10.3486313936144
1998	10.3631739441681
1999	8.03458541604103
2000	4.66990456823354
2001	0.889950208975705
2002	0.289451489172316
2003	1.27200012086903
2004	-11.4767794186597
2005	-21.5134271547881
2006	-23.1992250498943
2007	-21.3795216587802
2008	-19.0603867637513
2009	-9.72778860638065
2010	1.06788740200585
2011	-2.80990272914606
2012	-2.73306241514487
2013	-2.49094116417467
2014	3.3488411304073
2015	12.0303075395553
2016	21.0545540850892
2017	21.4574769736639
2018	20.7522752533249