Year	% of GDP
1990	14.703814069107
1991	16.9471166422083
1992	14.6784180651445
1993	12.2535230689085
1994	10.9581992320517
1995	10.4197945763345
1996	10.7061431080533
1997	12.829367947668
1998	16.1283975099739
1999	13.0089335760055
2000	14.1647875765598
2001	15.6015045534437
2002	16.1863919224758
2003	13.8744770306286
2004	17.555821316692
2005	15.0960360705096
2006	13.3144935197502
2007	14.506020271623
2008	13.4209103635812
2010	14.5060690869218
2011	13.9719244625808
2012	14.4185020668028
2013	16.2529200846574
2014	15.604510994433
2015	18.5336721298571
2016	17.2850481236976