Year	% of GDP
1977	54.63560634195457
1978	54.08048262351047
1979	58.681389131801474
1980	57.49530743262829
1981	54.75665302581413
1982	54.57039872469338
1983	56.115703862043866
1984	56.89388995350231
1985	57.69489122090712
1986	56.752216561657576
1987	56.54004800446152
1988	55.35224318374691
1989	57.68493393717713
1990	57.69315632699592
1991	59.44114871241742
1992	59.47844800303817
1993	59.47776503952211
1994	61.34545607374512
1995	61.91767515279071
1996	61.17059695629585
1997	60.94710721576393
1998	61.005617396698476
1999	61.38878035166062
2000	62.137787798349564
2001	63.276903815796636
2002	63.310472082967436
2003	63.528383714156256
2004	62.06124425078673
2005	60.86589594200246
2006	60.89419937742008
2007	59.04668149176855
2008	58.48146082401726
2009	59.41234380916319
2010	60.293400733501834
2011	59.033686435979504
2012	60.151350033150685
2013	59.11624795599821
2014	59.00395684477212
2015	58.6647853752423
2016	56.86840379992544
2017	60.55361847477968
2018	53.4074825753732
2019	55.440147775792624
2020	57.886850107978674
2021	56.001120582703
2022	58.04505499197843
2023	58.45065636715785