Year	% of GDP
2006	29.4808609645425
2007	24.827725527807
2008	19.6664853116056
2009	22.0589986293718
2010	23.6042427992505
2011	24.7194393813901
2012	26.2148354808766
2013	26.250286707839
2014	30.1352886827991
2015	36.0149359977906
2016	42.0162847564745
2017	46.5838931448949
2018	50.4828028882245