Year	% of GDP
2001	27.767733863933962
2002	28.677129604976216
2003	27.752364055401753
2004	30.042457521285048
2005	31.688826928291387
2006	35.59762116397741
2007	39.762307596724995
2008	39.823983881617906
2009	43.225513719022004
2010	47.21909820349602
2011	48.0225498165254
2012	51.596525815805464
2013	52.740638249389924
2014	55.39744965615571