Year	% of GDP
1991	97.5161911985386
1992	92.5793024717543
1993	93.3292054247805
1994	89.5923290486135
1995	79.3243652828204
1996	70.1610645093819
1997	63.4593037307638
1998	60.9797779429961
1999	51.9594237655962
2000	54.2468798002392
2001	48.587122085824
2002	52.0744399331235
2003	56.2821994430406
2004	56.8834557052473
2005	61.3736466240069
2006	67.4769495613156
2007	74.8027217374435
2008	81.3081646694465
2009	80.2163328540326
2010	80.2793124703141
2011	76.8049387707544
2012	68.1805123674371
2013	65.1210105316889
2014	60.4811520115259
2015	58.2338445836383
2016	57.7547225466992
2017	58.169043424847
2018	55.4170039987369