Year	% of GDP
1974	39.44705615998652
1975	14.680448909472835
1976	20.916072810966178
1977	22.824413114426335
1978	21.884886701812082
1979	28.116923804515785
1980	24.44123029019159
1981	18.013889061759407
1982	14.323183198354533
1983	15.825046882910796
1984	17.653582110387962
1985	22.35410891372557
1986	21.167742881561313
1987	17.953687846634576
1988	14.508636140348056
1989	11.61329896896597
1990	33.19581999467172
1991	32.1223372739268
1992	31.558677739934655
1993	4.230882323155292
1994	29.881344789386567
1995	32.1801537157458
1996	20.671945597687046
1997	21.275803738636263
1998	14.327876153891575
1999	14.452179029368606
2000	22.85268243876199
2001	21.23396883650434
2002	24.850879393032717
2003	26.664536097562568
2004	29.069699715441207
2005	18.78000879718695
2006	13.71067639791006
2007	12.320090597221366
2008	11.6376326075146
2009	10.163917297760175
2010	10.931159043709808
2011	13.903712316520195
2012	11.996237844914114
2013	12.418202925660522
2014	14.932760564749861
2015	16.739486765368454
2016	12.964805691398421
2017	15.325283552315435
2018	16.50522615080471
2019	17.809279732165727
2020	21.050420515812586