Year	% of GDP
1970	7.574731602753016
1971	8.312445066805823
1972	9.447659087594499
1973	12.129623955752296
1974	34.922958475567306
1975	28.790074090610272
1976	27.64585460952326
1977	25.731398272137636
1978	25.629764725929203
1979	29.879554121918066
1980	32.61462922786684
1981	22.79996291457616
1982	17.202977314548875
1983	15.364372704387849
1984	14.964825145331112
1985	14.084636923629574
1986	6.247420877345901
1987	11.091263245019691
1988	10.604958512282339
1989	16.158386488610027
1990	15.74911833283784
1991	11.306273874140397
1992	10.650837991397358
1993	14.703441813444934
1994	15.588860744833042
1995	13.416311634139815
1996	14.084759128301698
1997	12.57133998051496
1998	8.42894503717127
1999	12.050532543222687
2000	19.687688401509703
2001	15.5927967644826
2002	15.655973262383243
2003	16.526999799698427
2004	20.56749129673835
2005	25.937138400767026
2006	26.81167810532095
2007	24.037793180822515
2008	27.174916687577216
2009	16.133932232339422
2010	18.817106646832045
2011	21.30301826414563
2012	20.70183146037534
2013	19.7357681452706
2014	18.081549628328318
2015	10.48236052622026
2016	9.164691598149725
2017	12.883453777135395
2018	18.707930926731056
2019	15.27298199696237
2020	8.409338043874302
2021	14.770727238607805