Year	% of GDP
1979	0.4934135012561483
1980	0.6380473285783835
1981	0.730909527937976
1982	0.832899640060738
1983	0.7415430613732511
1984	0.7221632647163156
1985	0.6731075576424366
1986	0.7009053214698004
1987	0.7752417657852788
1989	0.9059210089626043
1990	0.9490573251593665
1991	1.2300859621468307
1992	1.476809855227256
1993	2.3269224000667443
1994	2.44380120319204
1995	2.2334797970653586
1996	2.692594095939318
1997	3.2820788091599895
1998	3.798117513102604
1999	4.322483599537161
2000	4.240997622824035
2001	3.503166204413613
2002	3.8101896837389675
2003	3.5341079008303566
2004	3.3997956179835427
2005	4.566118662350023
2006	4.531514991289783
2007	5.184097695576619
2008	4.2656328862537585
2009	3.843230795351501
2010	4.248245429400894
2011	4.028826862663962
2012	3.8157672701479677
2013	3.507965567381669
2014	3.434062600156435
2015	3.826995497572041
2016	2.8473900431537356
2017	2.2055687055667406
2018	2.3062069348168834
2019	1.887088491902308
2020	1.8203657771661772
2021	2.7203204787716686
2022	1.4812569835264324