Year	% of GDP
2003	4.593230903462583
2004	4.800775774365885
2005	5.351042187230172
2012	7.597761875610377
2013	7.644854184918037
2014	6.923311870682489
2015	6.201094425368735
2016	4.887893381788209
2017	5.595438217851578