Year	% of GDP
1970	7.574731602753015
1971	8.312445066805823
1972	9.447659087594499
1973	12.129623955752294
1974	34.9229584755673
1975	28.790074090610265
1976	27.64585460952326
1977	25.731398272137636
1978	25.629764725929203
1979	29.87955412191806
1980	32.61462922786684
1981	22.79996291457616
1982	17.202977314548875
1983	15.364372704387849
1984	14.964825145331112
1985	14.084636923629578
1986	6.247420877345903
1987	11.091263245019691
1988	10.604958512282337
1989	16.158386488610027
1990	15.749118332837838
1991	11.306273874140395
1992	10.650837991397358
1993	14.703441813444934
1994	15.588860744833042
1995	13.416311634139815
1996	14.084759128301698
1997	12.690476120587892
1998	8.513259474062263
1999	12.166233123284787
2000	19.86828896386905
2001	15.723825831121992
2002	15.777097443963257
2003	16.656733026989308
2004	20.72528540131832
2005	26.126517573320758
2006	26.985920312645224
2007	24.176145784248895
2008	27.33349020073986
2009	16.241464141508267
2010	18.94690460241967
2011	21.44800930764698
2012	20.84456507536654
2013	19.899363543395925
2014	18.238469913530555
2015	10.583606678420397
2016	9.260003048769182
2017	13.0237951404741
2018	18.924626197055606
2019	15.46068537639919
2020	8.510696104684376
2021	14.95037187505307