Year	% of GDP
1970	4.22409009832499
1971	3.6094221936187085
1972	3.395605053295661
1973	4.6654941571304125
1974	5.46592379456956
1975	4.954738067506281
1976	5.388687100500683
1977	5.9291922199971285
1978	5.1769297526580464
1979	7.344132166658082
1980	11.17766314806234
1981	9.168027232105926
1982	9.584956288937892
1983	7.8512441730926135
1984	5.218957723669357
1985	8.042504393466611
1986	7.201910201376206
1987	6.200609339034868
1988	6.990015431928733
1989	6.5806574999115135
1990	5.698073968454442
1991	5.243492894825513
1992	6.01926362679752
1993	6.296433939783867
1994	6.916989785840426
1995	7.376664486734786
1996	7.786737783434518
1997	6.770250437057734
1998	6.064392320067374
1999	4.957816301326869
2000	6.793519725788194
2001	7.1345587015712955
2002	7.699030066554897
2003	7.144458854378926
2004	8.031844483389895
2005	9.194232630631493
2006	10.385892579706871
2007	12.466113763321134
2008	18.245064469135595
2009	9.888361033530737
2010	11.623622868455172
2011	13.4578294083653
2012	11.31080321467094
2013	10.674078848303598
2014	9.125113877703285
2015	6.507048530195844
2016	7.1263720075917
2017	7.784598512399755
2018	7.314659367082974
2019	6.566526846231156
2020	6.028285597553911
2021	10.052756162077703