Year	% of GDP
1973	15.502919562845882
1974	11.930513341895853
1975	17.612512884964325
1976	22.136055999352138
1977	21.18118649995854
1978	19.4284102467061
1979	18.300717261547632
1980	20.543226345987314
1981	19.901501996919983
1982	18.689934202054342
1983	22.90170884440428
1984	22.275978715341406
1985	21.330922700602766
1986	20.67743399336092
1987	21.193469371336988
1988	22.246232738275936
1989	22.627657898896043
1990	22.228101415978347
1991	22.31934409138708
1992	22.373172862875073
1993	21.18170496503571
1994	21.73362664094613
1995	20.22179972938826
1996	17.988146653535665
1997	20.452127969812047
1998	20.048629649138714
1999	20.36748553945957
2000	20.221950166537233
2001	18.628089589659496
2002	18.94640282912796
2003	20.0582849340241
2004	19.89504677231607
2005	20.1090963211624
2006	18.960380490869117
2007	17.9850398297879
2008	20.288439212816705
2009	22.704348839441177
2010	22.112223459768735
2011	21.915456665265374
2012	22.570156626093702
2013	22.094507049344084
2014	22.458267869944123
2015	11.160976965619476
2016	22.192868281131318
2017	21.55070565282398
2018	21.888039171117914
2019	22.33999625079085
2020	24.241441339886023
2021	21.52104000150374
2022	23.85636550804105