Year	% of GDP
1972	19.031546574934126
1973	17.587928299732493
1974	17.071611746493208
1975	16.48086237727932
1976	19.365334532377577
1977	19.970658885937347
1978	18.312318581012548
1979	16.80435947847231
1980	16.30302902958148
1981	16.71192513560694
1982	16.370554725737463
1983	16.83525574151959
1984	17.690849680672027
1985	20.1933480486026
1986	19.146749790393134
1987	21.570135744512264
1988	21.672404531567793
1989	21.28758926300884
1990	21.619996235215794
1991	19.667148051309947
1992	17.141863462106738
1993	15.44674784509934
1994	14.821559022262612
1995	26.732390274038913
1996	27.31122031205755
1997	27.514850271263814
1998	29.670561404242175
1999	30.29785020406325
2000	29.858924959439836
2001	27.89281276622768
2002	26.763166888347
2003	26.894480629364857
2004	27.253502763414804
2005	28.556865461083525
2006	28.560308142954344
2007	28.507040675509703
2008	27.47193716292432
2009	27.233538461262185
2010	27.399518857974677
2011	26.6327333985174
2012	26.303910730343894
2013	26.467540628005914
2014	26.514890814054542
2015	27.136841709952186
2016	28.120504703137982
2017	28.127385086659864
2018	27.909146603384293
2019	27.41270182958358
2020	26.728765368049224
2021	27.290370392512024
2022	27.113173780145228