Year	% of GDP
1988	54.45870198457419
1989	65.04421980354086
1990	78.47232854628042
1991	45.27400463613211
1992	47.99815666175264
1993	42.64739299127186
1994	48.363436445717454
1995	54.31329254383919
1996	58.97421798333221
1997	63.71670103092784
1998	71.44257906612107
1999	80.06063379476032
2000	85.48501152959263
2001	83.40662231743526
2002	79.40755056802439
2003	75.42762014863749
2004	75.3028877725238
2005	67.26508495206207
2006	69.55327413342866
2007	71.5034147730478
2008	72.32981577509457
2009	68.52848350069003
2010	78.858978282107
2011	85.71905457253658
2012	85.98018285322769
2013	88.52940987696446
2014	94.3272962639499
2015	96.2253558060375
2016	99.78988162407144
2017	102.16194686955602