Year	% of GDP
1968	16.23006283228613
1969	15.025134984174269
1970	16.60551241573513
1971	15.7933255269322
1972	18.992332968236724
1973	13.541666666666755
1974	8.186068393660525
1975	7.8403744055557345
1976	8.182338355903141
1977	8.507732750674297
1978	7.845233005557964
1979	5.478544308331543
1980	4.704293404858406
1981	8.42080215741752
1982	10.299889104737117
1983	11.200380318516846
1984	13.345566253633889
1985	14.39067933225872
1986	14.835517335517437
1987	14.310795454545536
1988	14.58558475108333
1989	16.396101509709553
1990	8.24886234611502
1991	15.615665840627916
1992	19.870574171824124
1993	15.502714311874294
1994	20.112103423826607
1995	20.58513658514459
1996	18.597082328873647
1997	8.456601884935305
1998	10.909707096247354
1999	7.203503923974308
2000	4.63474550697269
2001	6.930957054531503
2002	8.562671712209402
2003	8.405608292624656
2004	6.938561306247007
2005	6.886862735424456
2006	5.826032905141726
2007	4.929498275950853
2008	3.847780195488263
2009	5.229933191379472
2010	5.1622835468003645
2011	4.563773437496183
2012	4.124271437584839
2013	4.768439715855295
2014	4.9294077720475515
2015	4.191868175172115
2016	3.977189811461293
2017	2.9767278010133547
2018	2.815817643204917
2019	3.7700082530619885
2020	6.088674132807848
2021	3.2791975295303812
2022	1.6350521659517867
2023	2.8043954315554327