Year	% of GDP
1990	18.4124756779243
1991	32.1216712833016
1992	34.809868384258
1993	36.9980579679017
1994	33.3195315817464
1995	29.4119524316546
1996	30.8584217446658
1997	32.0457949957263
1998	33.4217715032917
1999	35.9394043416849
2000	34.3121390057213
2001	38.9155790718665
2002	38.8746144299781
2003	40.1928552007849
2004	38.9792961239446
2005	38.4237552348991
2006	42.8568624371859
2007	47.8027627030873
2008	63.5102004635832
2009	61.5835208656414
2010	63.2300051615653
2011	65.9132742413953
2012	64.0668947634902
2013	67.2256841863848
2014	71.0449131903071
2015	73.1171273860867
2016	75.5879818087251
2017	73.4373758994307
2018	73.4538246004106