Year	% of GDP
1970	10.411225907316014
1971	11.228226810318926
1972	21.868643040864352
1973	22.21785690231911
1974	21.78958260933717
1975	20.648772867771694
1976	21.124771272950106
1977	22.453941876026143
1978	23.735041561082483
1979	24.42663339591898
1980	23.531878093603524
1981	23.34737847130735
1982	22.516103737406876
1983	22.411240608931443
1984	23.47590024105827
1985	23.685341643736926
1986	23.597141341736922
1987	23.06105908801155
1988	22.47485790913594
1989	22.022926201525106
1990	21.285281723869154
1991	20.117019308949196
1992	19.827165109970714
1993	20.09015304818403
1994	20.403799190804307
1995	20.86459908565059
1996	21.320302108651397
1997	21.582836221803145
1998	22.25525462998977
1999	22.787683575789114
2000	23.146279487017402
2001	22.538508810633676
2002	21.53990060305013
2003	21.62260560644877
2004	22.127737002827818
2005	22.934640837161982
2006	23.038173633353004
2007	22.32301439496462
2008	21.235472613081964
2009	18.81013535853923
2010	18.31393654755531
2011	18.736982148154855
2012	19.51260522813811
2013	19.754425813220948
2014	20.41964346258531
2015	20.64928164327132
2016	20.68020203018222
2017	20.989167810773164
2018	21.29599686607364
2019	21.351794342327715
2020	21.584208564012012
2021	21.324736752274337
2022	21.271271080745933