Year	% of GDP
1970	0.1659079163082533
1971	0.13947743807498933
1972	0.5456403011917582
1973	1.2282596693378105
1974	1.1070821893891185
1975	0.5675932049267322
1976	0.5330885526379273
1977	0.529519064640956
1978	0.5142600344883986
1979	0.6534964649660969
1980	0.6519851954354813
1981	0.25825166566490065
1982	0.22247552501035214
1983	0.35745654417070605
1984	0.3163924553112174
1985	0.3896497702430823
1986	0.4228556432243452
1987	0.5995306425781562
1988	0.8121536801300173
1989	0.756318504797755
1990	0.5024124006708326
1991	0.7184960417232273
1992	0.7944713512636234
1993	0.5778588535108569
1994	0.6126794072373494
1995	0.34384788352663637
1996	0.20876656020976816
1997	0.11789532937913519
1998	0.06613509749655626
1999	0.10423039737970491
2000	0.14365445154752587
2001	0.07189379955170906
2002	0.12646861410363155
2003	0.13425895083814524
2004	0.24836262472103304
2005	0.24214476147314126
2006	0.4728635270020523
2007	0.4552808511248693
2008	0.4900742622157721
2009	0.5184358194677787
2010	0.8496746019886043
2011	1.0272918236976503
2012	0.7779498228279863
2013	0.5031225769495441
2014	0.37193352604805296
2015	0.3165429317352571
2016	0.5006052714333175
2017	0.6511647069029008
2018	0.663078292286861
2019	0.41195509968481525
2020	0.527222777953315
2021	1.015248997343463