Year	% of GDP
1992	10.5618304277868
2000	13.7485238233208
2001	14.3016934269049
2011	16.9914330535178
2012	17.1332601154634
2013	17.2942817184637
2014	17.344748336043
2015	17.9695712637788
2016	17.8361279420494