Year	% of GDP
1994	20.000465829908276
1995	20.253348504208578
1996	20.844305450292318
1997	20.55579901881241
1998	19.758809641947938
1999	18.940996258260505
2000	19.43234226287252
2001	18.946348366860473
2002	17.804650598775506
2003	17.74073866258398
2004	17.94985614871452
2005	18.95197060893615
2006	19.284537890936377
2007	18.97844855480911
2008	18.858452385057287
2009	16.818497008920705
2010	16.068503073800084
2011	16.834774385871594
2012	17.292122858558084
2013	17.89779685732629
2014	18.44517560344711
2015	18.07915621422729