Year	% of GDP
1990	13.29999880294856
1998	0.9538693965105514
1999	2.837673810064184
2000	8.134835504941378
2001	2.152623039581192
2002	4.477058561346168
2003	8.765314485978863
2004	12.00871438057966
2005	10.87080614787452
2006	13.638840481692663
2007	20.16796277480534
2008	10.493896412418938
2009	8.764560939419779
2010	14.674349547343557
2011	15.002169197396963
2012	12.680767678839342
2013	11.917939182373939
2014	13.817761191686252
2015	10.814069047117433
2016	9.73720135067321
2017	10.879150702261828