Year	% of GDP
1968	3.1029607697965575
1969	2.9342788178683894
1970	4.640306464332221
1971	4.801235684589183
1972	5.262472127465233
1973	6.322823098923447
1974	4.908905554445826
1975	5.563431386534313
1976	5.839161726472445
1977	5.1350362670808005
1978	4.618003356337783
1979	4.23455662211717
1980	3.735849244692066
1981	3.9328698326215252
1982	3.8612368589049733
1983	6.24363275453303
1984	7.016444660614979
1985	7.138442801834591
1986	7.749468880333872
1987	6.168976587048395
1988	5.904004400393205
1989	6.2706744059004045
1990	10.469735783354649
1991	9.671042509488146
1992	9.835534057489166
1993	9.901584804772774
1994	9.010624189721558
1995	9.593719559943898
1996	9.526001129498187
1997	9.490635335868264
1998	9.165276054421508
1999	9.633788328888013
2000	9.24669139274837
2001	8.869705096315279
2002	8.774597662022213
2003	9.114982209822982
2004	9.391010597445822
2005	8.41473702588333
2006	8.12440913215915
2007	7.682460337653948
2008	7.1122637054379325
2009	7.42479262703465
2010	6.917205464994304
2011	6.681176806093307
2012	7.5165760933477666
2013	8.014047553372
2014	8.483204639445692
2015	7.625755954011168
2016	7.473406568584052
2017	7.567786590617471
2018	7.382368407725473
2019	7.346278793255863
2020	7.389988390416743
2021	7.639453305493485
2022	6.993860249565202
2023	7.176043912958244