Year	% of GDP
1973	14.225780777398889
1974	11.511715155256246
1975	16.264528479189106
1976	19.853858621611675
1977	19.453257144158123
1978	17.493768194059744
1979	16.282084863537825
1980	18.169755891698617
1981	17.40789434541915
1982	16.438793944028525
1983	18.836719305739127
1984	19.25811577947727
1985	17.77131569739849
1986	17.54198509675846
1987	17.576085601347515
1988	19.010160625809775
1989	19.82622307587172
1990	19.385792526786354
1991	20.02383808952152
1992	18.895872907636164
1993	17.860156222338453
1994	18.038632188370958
1995	15.900135200241468
1996	14.616192811856482
1997	15.78100714888509
1998	15.780886229459313
1999	16.52614637939588
2000	16.7284303346812
2001	14.93965193386298
2002	14.807183030212101
2003	15.881497148271661
2004	16.024511030985682
2005	17.02713166682878
2006	16.02867142280253
2007	15.105461755175128
2008	16.967219458653176
2009	18.073013065712445
2010	18.016713372321462
2011	18.0045184138976
2012	18.621707486795724
2013	18.122603739689623
2014	18.083856415994966
2015	8.758005967653041
2016	17.60779165363478
2017	17.932644088854865
2018	18.40604811147752
2019	19.407438079467614
2020	20.706233464179256
2021	18.26439463082202
2022	19.050497729317886