Year	% of GDP
1972	22.986583710162144
1973	24.487557345735627
1974	25.62786747699427
1975	28.324351492798495
1976	28.395736194755376
1977	28.85616523077368
1978	30.007943834121622
1979	30.53685496108005
1980	31.80827384833471
1981	31.782432445904128
1982	33.08726975119572
1983	33.25438232554463
1984	33.43803341047901
1985	33.68108340879004
1986	35.50039430264375
1987	35.846310138016285
1988	34.52329142137501
1989	33.97730084579482
1990	34.18590237695482
1991	36.69536137372634
1992	38.05548599100888
1993	39.30974549424359
1994	38.73821694781732
1995	43.98494368016584
1996	41.4082916542958
1997	40.53711393925151
1998	39.125822093688285
1999	38.846045511455024
2000	37.957470612598115
2001	37.908759477789204
2002	38.1518420599067
2003	38.50673134098881
2004	37.80194996810597
2005	37.91375305407599
2006	37.33368938571521
2007	36.59072347148714
2008	37.372441479799924
2009	40.684679854149266
2010	41.15655128068556
2011	39.47247787435134
2012	39.6343040600985
2013	39.52436651401541
2014	39.06824821761527
2015	38.376546409902936
2016	37.925635614976876
2017	37.524616881106354
2018	37.18876816513593
2019	37.11100953069652
2020	43.07697990932151
2021	42.13754256933145
2022	40.61829080372701