Year	% of GDP
1990	19.044365306524
1991	17.9848068494084
1992	16.7989540641285
1993	16.2549461999012
1994	15.1464723607339
1995	12.3385920363067
1996	8.8179735649557
1997	7.6753442054256
1998	8.36486470628632
1999	6.25957466416907
2000	5.72156076028006
2001	6.04784603483863
2002	6.39267295696904
2003	6.46950502543315
2004	7.36779372586438
2005	7.13434229849969
2006	7.75866449871243
2007	8.23040125170761
2008	7.76671531899226
2009	9.42468304930795
2010	8.00580463307968
2011	8.66448419304319
2012	8.82025471268309
2013	8.42918100920435
2014	8.557794861892
2015	6.82440578309008
2016	6.86805572917407
2017	5.70644467890375
2018	3.77070065247593