Year	% of GDP
1977	74.16841904033646
1978	74.85800833017797
1979	74.48627822090037
1980	73.11166419642608
1981	72.72389169889914
1982	75.20195838433293
1983	76.20869983369732
1984	76.45220973259792
1985	75.62732097484702
1986	72.38563515279766
1987	72.02793469091375
1988	72.03320398663917
1989	71.93425014240378
1990	73.11659071390439
1991	73.0381968669903
1992	74.10388071492052
1993	75.24701907399768
1994	75.46810931241261
1995	74.93206031600972
1996	75.14016143106457
1997	75.46523708179095
1998	75.84413513665609
1999	75.68055179995478
2000	77.4101476872206
2001	77.53293180657496
2002	77.00004536886954
2003	76.7093315829778
2004	76.06805524977534
2005	75.41636577364858
2006	71.57018735189993
2007	71.16649359640014
2008	70.93114501493332
2009	71.48848640273549
2010	73.65667319964967
2011	73.82421718054925
2012	73.53670891021687
2013	74.13521858801502
2014	73.94650320722889
2015	73.0892285815855
2016	71.15263651213151
2017	70.21898304592766
2018	67.90485340371323
2019	68.41052281338213
2020	67.8111914731633
2021	68.4248870756229
2022	68.59968906656513
2023	67.8467135333456