Year	% of GDP
1971	0.3144934630748114
1972	1.0466138345283607
1973	1.6672169439480626
1974	18.828949153377184
1975	12.72250580177594
1976	11.915621070697394
1977	14.091606776753933
1978	10.836065465443568
1979	27.419716609751006
1980	16.60619356027401
1981	3.8448949276805915
1982	1.5854380207874503
1983	4.397483211325051
1984	6.957282887433829
1985	8.068226474092846
1986	2.8552823491409773
1987	5.599274039229974
1988	4.744764368655646
1989	11.073692941264937
1990	12.844299648442828
1991	8.322530026528664
1992	9.37222530061074
1993	14.536167610707075
1994	12.71555347343112
1995	12.304376988427215
1996	13.04901250284535
1997	11.806179980247405
1998	5.782442452232928
1999	6.307372689613015
2000	15.035241364852816
2001	9.917515284131314
2002	7.976867387849428
2003	7.975701576685653
2004	10.066541677874085
2005	14.640666507529403
2006	13.442127227741373
2007	12.472980380450833
2008	13.98145924479952
2009	7.536354611891689
2010	10.72682180917427
2011	13.733186272636479
2012	12.079488024067482
2013	9.016207342870597
2014	6.663755875715626
2015	2.674343376374753
2016	2.4430825582789013
2017	4.616248035225259
2018	6.554153803545591
2019	5.7084283786126075
2020	2.9044709339713304
2021	5.256433146997002