Year	% of GDP
1990	55.10882587988004
1991	54.359724039666354
1992	53.79390673019628
1993	56.08367210588505
1994	51.37449694692528
1995	49.36355209629413
1996	47.59002595772794
1997	51.713362322152676
1998	54.64067189007891
1999	53.02380821839407
2000	56.41057669393526
2001	58.23644658027221
2002	61.48070297954895
2003	60.99430972230779
2004	63.928938838492094
2005	63.091859884168905
2006	60.55628986812744
2007	58.27771033050436
2008	57.09544150212924
2009	56.3529447807272
2010	52.034055931433464
2011	52.184281253614934
2012	51.27377081924931
2013	50.99790607201755
2014	50.60736892305002
2015	50.84335233645709
2016	47.67402943805428
2017	47.62576915859258
2018	46.56564715811671