Year	% of GDP
2004	0.18615219061919405
2005	52.28477187762968
2006	60.00726207574299
2007	71.05872315519748
2008	76.40075602563728
2009	83.07036447763362
2010	85.05298481524635
2011	81.84263671918902
2012	79.26763134648922
2013	65.34125860977899
2014	54.496282273624274
2015	49.8738296838045
2016	46.636077441614006
2017	45.05795553121469
2018	43.30444771652496
2019	42.33699729409721
2020	43.282716038938275
2021	40.90366405755117
2022	41.06932567042541
2023	36.89357376903044