Year	% of GDP
1972	25.914634146341463
1973	26.06238452342137
1974	27.665677546983186
1975	31.419037583421144
1976	28.50186193067889
1977	31.387841206929618
1978	34.162436548223354
1979	33.84228836490143
1980	34.95391513742423
1981	36.22135842880524
1982	37.26565796612213
1983	36.58384925248047
1984	37.168840492999884
1985	36.14168169288482
1986	37.47001880834469
1987	41.083583737045444
1988	39.1861642214523
2001	31.55129280875132
2002	30.725790606668095
2003	31.21734162848957
2004	30.43645921622164
2005	30.985697539539824
2006	31.38531662054371
2007	31.310366255430623
2008	32.63676969050611
2009	34.13502858877961
2010	34.23279007779996
2011	40.086095855043894
2012	35.03043302343973
2013	33.09154327590132
2014	32.356416796113706
2015	31.536873964846883
2016	30.728221494193996
2017	29.921310246144113
2018	29.704167251847814
2019	30.086221465603963
2020	36.40284824020098
2021	33.65078677057685
2022	35.925593913539714