Year	% of GDP
1972	16.395710826703564
1973	16.291208791208792
1974	14.44130697862041
1975	16.878684455476265
1976	17.456268221574344
1977	17.693836978131213
1978	18.42088627599722
1979	17.87912602138152
1980	18.072496463120867
1981	18.269839260853058
1983	16.567187792144285
1984	12.32844329479795
1985	13.735379179666909
1986	13.735896928892918
1987	13.880669522589764
1988	13.507113589141378
1989	13.674717000720118
1990	13.655592705646615
1991	14.299362546854402
1992	16.057448178472388
1993	17.851701559605083
1994	19.259368098539017
1995	17.939837366680887
1996	18.338794954291636
1997	21.877290722276197
1998	17.21930186501189
2008	30.83969338469216
2009	31.63348696027471
2010	31.452440926738262
2011	30.668202570768333
2012	30.67521336604524
2013	30.834330601425357
2014	30.309748522020936
2015	30.38437765406174
2016	30.790831595506557
2017	29.48088899335039
2018	30.292474847493306
2019	29.172854741424704
2020	29.63526290767362
2021	29.872478629691233
2022	25.758643538427034