Year	% of GDP
1972	17.473203862888674
1973	18.12156132218516
1974	18.17729260747431
1975	18.868578632209264
1976	18.634547131319344
1977	19.276435965090318
1978	19.879222747125414
1979	20.169555388093443
1980	20.659993968723523
1981	19.607531288613757
1982	20.57549637634547
1983	20.289976768270495
1984	21.13699713274817
1985	23.05389846789968
1986	22.521447577229175
1987	21.91198168404986
1988	22.679239216880724
1989	25.457047583761184
1990	23.356851778601587
1991	22.657631113730112
1992	20.912099369871708
1993	21.6283156898605
1994	21.318945286840908
1995	22.023569954794752
1996	22.964754537364698
1997	23.054873900490964
1998	23.598098804059298
1999	24.08549272830601
2000	23.06981537543437
2001	24.00199517064083
2002	22.70167596822538
2003	22.702490761056733
2004	24.080778820201356
2005	25.730138500550087
2006	26.929269060118134
2007	27.258305968797202
2008	26.871294111050858
2009	24.9965390873939
2010	25.51922671658581
2011	25.97405475509873
2012	26.5227856834625
2013	27.410186223180432
2014	28.87261305671651
2015	29.647258188711202
2016	29.04065900151948
2017	28.913155819620567
2018	28.364336831890185
2019	28.897615749940208
2020	27.78783339020194
2021	30.120304006076026
2022	30.39634075429316