Year	% of GDP
1970	2.73872902059621
1971	2.723850916526781
1972	3.0702211143395157
1973	4.541387396114725
1974	11.46096151949769
1975	10.417287408078133
1976	11.103724583059043
1977	11.248680225064508
1978	10.602172802995403
1979	15.526233176151367
1980	15.937438351095151
1981	11.153531794437981
1982	9.489465402701708
1983	9.489918485110868
1984	8.967474725588174
1985	8.796799376000974
1986	5.14569299744739
1987	6.537681325421644
1988	6.12167109082685
1989	7.567822069661576
1990	8.664227613225645
1991	5.215985530014642
1992	5.2561502549966725
1993	5.2183634937722925
1994	4.74619113599843
1995	5.062922492020277
1996	5.3150665709891385
1997	4.623995856892536
1998	3.0598184085818465
1999	3.8490334636994232
2000	6.146564910942358
2001	5.437272908690322
2002	5.250169142121388
2003	5.512724517124275
2004	7.011395776671907
2005	8.29817561288847
2006	8.968235404729246
2007	8.754663487354
2008	11.086245243426218
2009	6.170349642814965
2010	7.634703617662968
2011	9.345143680565007
2012	7.414938547346546
2013	6.294082993848551
2014	5.3449818005930005
2015	3.0175559680248005
2016	2.7111546737220564
2017	3.370097693046514
2018	4.142096096760099
2019	3.434604797913957
2020	2.395054231748962
2021	4.787779379358896