Year	% of GDP
1972	23.457367012568263
1973	24.288193720245356
1974	25.741476792155137
1975	28.29911350966451
1976	28.513148323716926
1977	28.740028422858074
1978	29.631719415415024
1979	30.131219601154317
1980	31.237920217404433
1981	31.713566415542996
1982	33.57151764584951
1983	32.59898071298582
1984	32.663737732013395
1985	33.481106322688404
1986	34.45624500426602
1987	34.376437130813365
1988	33.08623389623559
1989	32.571187460956295
1990	32.47363927168343
1991	34.7092032070988
1992	36.27541971638908
1993	37.348655366012075
1994	35.956608751810236
1995	37.710409349492274
1996	38.46308084652986
1997	37.26200429782502
1998	35.11120330139064
1999	35.00367087620762
2000	34.449633283568126
2001	34.60001620302337
2002	35.13717353418209
2003	35.56484200904511
2004	34.910395373598796
2005	35.019700436854215
2006	34.559956181184404
2007	34.453546750536994
2008	34.9765572891066
2009	38.71769329471282
2010	38.22789634806881
2011	36.410241938512094
2012	36.86695222104292
2013	36.425297648769835
2014	36.24076394843226
2015	35.985385925155136
2016	35.67426057744548
2017	35.37463025627611
2018	35.04066070189036
2019	35.0883805258435
2020	41.15298236412445
2021	39.139103560835885
2022	38.01861885045967