Year	% of GDP
1972	13.947373582714809
1973	14.178261379950765
1974	14.26115164505786
1975	13.842294931294687
1976	14.53087877878183
1977	14.68178702969137
1978	14.834090155470685
1979	14.921865926905992
1980	15.337891725457858
1981	15.35093445302169
1982	15.536623025878066
1983	15.942133706436595
1984	16.043754183271798
1985	16.163566852359455
1986	16.6848474230261
1987	16.822079936158712
1988	16.95591920200649
1989	17.13498369498079
1990	17.06603029261728
1991	17.880119553646715
1992	17.989901695137384
1993	17.85450308080106
1994	17.796566663077794
1995	18.572762482577755
1996	18.733075511922863
1997	19.150843641263755
1998	19.491353172977725
1999	19.951183180113325
2000	19.760603236827766
2001	19.356657556820082
2002	18.961390659697344
2003	18.748661603769172
2004	18.471805331376842
2005	18.64378295777222
2006	19.034393403655873
2007	19.14343692295961
2008	19.00895386700188
2009	18.48932527601627
2010	18.674106156572897
2011	18.80449323811419
2012	18.52267065582688
2013	18.993275937929774
2014	19.03812944524259
2015	18.939871011357656
2016	18.85452672665652
2017	19.026942479023255
2018	19.17313472499859
2019	19.225319309267103
2020	18.898556388618957
2021	19.301124056609154
2022	19.554727666314502