Year	% of GDP
1972	2.382233760740488
1973	2.620827601183093
1974	2.1369297250890793
1975	2.2451545082556574
1976	2.338680971129295
1977	2.2854305523923966
1978	2.4912068979189
1979	2.3591579074636004
1980	3.4868358963575194
1981	2.6647229279355824
1982	2.9818078717354193
1983	2.891145707333245
1984	2.312981187056561
1985	2.234913193099951
1986	1.959073326547768
1987	2.1930913918007735
1988	2.419836938911675
1989	2.0011394914533596
1990	2.06188587065988
1991	2.1119494702245483
1992	2.6620421386863997
1993	2.5457783557025704
1994	2.229744196213807
1995	2.2242482516255024
1996	3.077110814050922
1997	2.310214701418681
1998	2.841644081981497
1999	2.4941941357205915
2000	2.269448304398146
2001	0.9493427712331493
2002	2.8386963001298544
2003	3.1396194352850904
2004	2.9560061025803788
2005	3.1740908304637108
2006	2.3660510176358214
2007	2.1788909025136163
2008	2.1875472309004955
2009	2.5604429600737686
2010	3.095799408127522
2011	2.64848195761586
2012	2.518439165444668
2013	2.089095987942761
2014	2.2449842079721387
2015	2.4484735632971955
2016	2.4304695902374727