Year	% of GDP
1970	12.432360933730845
1971	13.74532987678587
1972	16.267398269311055
1973	20.33802135520986
1974	47.84202495812988
1975	38.41662352004554
1976	37.656730193899
1977	35.20034690523929
1978	33.3821214724599
1979	53.0438335821697
1980	48.3471363692296
1981	37.19309498517788
1982	24.638264891061496
1983	22.42809356308887
1984	21.948736664106857
1985	18.919176637036006
1986	10.66712691277931
1987	15.9247744695373
1988	15.311095006075174
1989	22.100606811746022
1990	23.62458236219007
1991	19.602018001676367
1992	19.89714764739229
1993	20.77961423009664
1994	19.73194588522143
1995	15.987987529660051
1996	18.09748816433699
1997	16.099687972638367
1998	10.79177400755049
1999	14.620548345215452
2000	23.24567498131998
2001	18.443270225124433
2002	18.023674573419964
2003	20.373699004591032
2004	24.516887008708043
2005	30.072551805450058
2006	30.831788018723746
2007	28.154346124368004
2008	31.856098273023985
2009	19.75700907687316
2010	23.0025791078149
2011	28.4557608313762
2012	27.779433390959692
2013	26.403950586184752
2014	23.84074808201171
2015	13.832323719943295
2016	11.67556560893691
2017	14.782545215904326
2018	19.60076197727548
2019	16.643145646067612
2020	10.140719684312955
2021	15.159675686022458