Year	% of GDP
1972	21.198944870698483
1973	20.40286274962484
1974	20.161478872141778
1975	22.9154981899233
1976	22.27495101110415
1977	23.805738326443755
1978	22.87674370412381
1979	23.116000983860896
1980	24.604168599437177
1981	25.688587243015288
1982	26.644144409261592
1983	28.732460980608543
1984	27.44042712267316
1985	26.351596072711608
1986	25.459311808709135
1987	28.424022217587456
1988	25.931880154887587
1989	25.624505574267843
1990	25.353123674500623
1991	25.36069506052751
1992	26.600267074265016
1993	28.69088090552689
1994	25.985425843629006
1995	25.605138221467694
1996	27.939889760578357
1997	26.827539074586788
1998	26.91202433317605
1999	27.57559699834191
2000	25.68156954798699
2001	24.34835684486368
2002	21.183103487607884
2003	19.425351476828716
2004	18.781791156850947
2005	18.17527958894901
2006	17.897279288343267
2007	19.25026109507381
2008	20.414935154062036
2009	17.054510622551078
2010	16.779063924685325
2011	17.020962928030706
2012	17.47680467933308
2013	17.23965190351139
2014	18.02089947083316
2015	17.997109890065772
2016	18.466144403432764
2017	20.188530215665242
2018	18.18852713243695
2019	20.900815877308794
2020	18.052411733608277
2021	17.22885533199359
2022	16.220527796294956