Year	% of GDP
1981	30.018021040029602
1982	31.659250982835108
1983	30.98842360286522
1984	34.68240553958662
1985	32.39721537629494
1986	33.039837884508536
1987	33.59029660127759
1988	34.491381925083466
1989	34.9101396472556
1990	35.421988315089116
1991	28.94990568475886
1992	26.17535007743762
1993	28.009330936275635
1994	32.97493094772094
1995	32.32494056636922
1996	32.46438603005555
1997	26.703184969111366
1998	32.040838639238274
1999	34.9856313498315
2000	37.44799278103052
2001	38.499283331383964
2002	41.443141318703866
2003	42.75015579578539
2004	40.07365782292124
2005	39.14495030161708
2006	38.57263514210702
2007	39.114110581605786
2008	37.90012960828261
2009	38.770815484525926
2010	41.75507409091938
2011	41.43005658626341
2012	38.58152049627979
2013	39.67009797591922
2014	39.89200849593313
2015	39.54570915450308
2016	36.72458993289318
2017	36.63365455650578
2018	36.409727146825105
2019	37.147582886710815
2020	36.82807200065664
2021	36.535745252733
2022	36.54377367929102
2023	36.98302153512579