Year	% of GDP
1976	38.42869980414252
1977	40.32896134239592
1978	36.87891701791018
1979	37.28747612022195
1980	43.189897100093546
1981	42.90924259579286
2001	27.138265536147994
2002	26.020607567951682
2003	25.618879006308926
2004	26.151653915038214
2005	30.652752336533656
2006	34.764747010194114
2007	30.439970062612947
2008	33.6543683737318
2009	34.283549305250936
2010	32.92791007163689
2011	28.69359625735701
2012	29.70302906623516
2013	30.298976639144136
2014	32.57337242426638
2015	35.616647484921636
2016	31.109550072284474
2017	28.476594907085296
2018	28.739604607169554
2019	23.959549705780972