Year	% of GDP
1970	12.033195020746888
1971	12.448700410396716
1972	11.70610284595908
1973	12.98630208144121
1974	15.031416143064282
1975	13.967971530249109
1976	13.353116222296595
1977	13.327343915164539
2000	20.280870326719437
2001	18.460305516920474
2002	18.135725489406703
2003	18.035847072283705
2004	21.12471557048434
2005	20.442683814845815
2006	23.371209183277745
2007	28.147873502786354
2008	29.349596005440194
2009	18.032399697858235
2010	18.234264215499554
2011	21.05896883780988
2012	21.413732172680945
2013	19.699585222688516
2014	19.33630543600553
2015	21.135947204766584
2016	18.83145309775592
2017	19.55360938382747
2018	21.303913938989187
2019	19.877850603531822
2020	15.552421443873948
2021	19.63947002416069
2022	20.176360026672068
2023	20.55631676933206