Year	% of GDP
1972	14.908336215842269
1973	15.137362637362637
1974	12.283178701089149
1975	14.225876512565932
1976	14.079203109815355
1977	15.923506579570198
1978	16.056640748467032
1979	18.72142831431554
1980	18.240737200321185
1981	15.725857486394126
1983	16.75272188583181
1984	17.53731173654709
1985	16.726930803094415
1986	13.669137987403898
1987	14.44355670827428
1988	14.439908840815791
1989	14.98504996614962
1990	15.295646824583104
1991	19.23330416943269
1992	18.86738957057459
1993	22.935190760268437
1994	21.93510538942022
1995	20.955493712872656
1996	25.17318751115193
1997	27.570984890103865
1998	21.848929924505516
2008	30.340167241052256
2009	35.56781454373891
2010	32.87628245508172
2011	30.338766531431922
2012	29.58029220935971
2013	29.12136214097624
2014	29.37757842164534
2015	28.881926284079313
2016	30.64548774401165
2017	31.732242351716884
2018	33.543650483460716
2019	35.57163752620125
2020	34.068244682078365
2021	30.940412187104798
2022	29.67046245776882