Year	% of GDP
2008	17.4185948566579
2009	15.7876406651103
2010	32.6972983667659
2011	36.9628219945778
2012	36.639523668504
2013	33.7028376001735
2014	32.5842194193756
2015	31.7702194415291
2016	30.0205804782345
2017	28.7425701539709