Year	% of GDP
2000	12.7321736972139
2001	13.6545085823109
2002	14.5620167606837
2003	15.601669429639
2004	14.7169696325059
2005	17.1906455436072
2006	19.3293718863981
2007	16.8776902495689
2008	18.9058870235594
2009	16.547440056614
2010	19.5122476604078
2011	18.7372726898506
2012	19.1033143830995
2013	24.2080541237567
2014	26.1251398954064
2015	23.2444318585619
2016	22.0244487529363
2017	20.39920601977