Year	% of GDP
1977	44.5191324032845
1978	40.8234860812961
1979	44.4562849502682
1980	42.9947558221281
1981	46.0558316103462
1982	51.1877658325548
1983	56.2628139348704
1984	57.6552899196759
1985	59.6895872910159
1991	77.2030257526532
1992	87.7252860700165
1993	105.226329861023
1994	77.4124968866892
1995	68.9735449057896
1996	72.4085207775225
1997	77.6778995192158
1998	83.3367533375458
1999	89.0459513820489
2000	88.0444732904074
2001	92.3236982257001
2002	102.894214133455
2003	107.011338629278
2004	101.030260033961
2005	98.7830273605368
2006	99.9389821633064
2007	102.104488296706
2008	99.7225285526126
2009	116.810706298409
2010	116.474588615924
2011	116.294086854459
2012	123.161374657441
2013	128.316760042844
2014	128.284250226172
2015	152.54494506045
2016	167.866452752145
2017	166.792718405672
2018	168.815931247696