Year	% of GDP
1960	1.592
1961	1.85507246376812
1962	3.10416666666667
1963	2.40794223826715
1964	1.84375
1965	1.8571428571428599
1966	2.91492329149233
1967	3.36094674556213
1968	2.8559463986599702
1969	3.76288659793814
1970	6.07293127629734
1971	5.32267977873387
1972	3.70967741935484
1973	3.98486197684773
1974	3.2912696368787
1975	2.25396825396825
1976	1.9686162624821701
1977	2.4639944473364603
1978	3.79922644163151
1979	3.22074942645934
1980	2.92236435818262
1981	1.75511376328302
1982	2.2405257767156
1997	4.078026715668949
1998	5.29744153194161
1999	3.7838602447131997
2000	3.14686367358096
2001	2.4135078584983702
2002	2.06923852022456
2003	2.07204807151526
2004	2.0710744567483697
2005	1.52811115994456
2006	1.12033540648601
2007	0.946677517254647
2008	1.48985108130425
2012	3.74560382719202
2013	7.639330848258929
2014	15.479576301383199