Year	% of GDP
1995	9.75628992822778
1996	8.82040872814504
1997	12.7806031808323
1998	11.8209259357821
1999	11.646030794967
2000	12.0854489075402
2001	12.9550258528178
2002	13.4558157971023
2003	13.7506979456331
2004	12.6418564608281
2005	13.5572656534694
2006	13.38278926175
2007	13.9512164376654
2008	12.2889002816266
2009	12.7510930193366
2010	11.7135852927527
2011	13.7164898029941
2012	13.6661937289433
2013	12.6917002275667
2014	13.318807010841
2015	13.6210812958932
2016	14.4916604695634
2017	14.6812479897073
2018	14.366232940747