Year	% of GDP
1972	10.265486725663717
1973	9.84081041968162
1974	10.555555555555555
1975	12.181818181818182
1976	12.399708242159008
1977	13.034072471606272
1978	13.778348309798888
1979	14.308996088657105
1980	14.263917227738803
1981	13.514759443273865
1982	14.464140337121078
1983	15.772029864642473
1984	15.026320803410737
1985	14.531833688507193
1986	14.174342886854207
1987	15.281253742257842
1988	14.726714108055313
1989	15.937164451036297
1990	15.415721060802426
1991	14.950219555947431
1992	15.43797248291896
1993	11.333908829191259
1994	11.362162426223412
1995	11.516836551192522
1996	11.70368635223323
1997	11.283780096050524
1998	9.837427368303423
1999	10.506338245725932
2000	11.552882373020791
2008	19.729745546685386
2009	16.883171912164702
2010	17.26609217633429
2011	18.169056271212945
2012	17.93811658460346
2013	18.053840416120114
2014	17.688599109241437
2015	18.368196871464697
2016	19.19158887853931
2017	19.446905846251173
2018	18.334242740729646
2019	18.503489584560356
2020	18.648397945928696
2021	18.39197817354051
2022	19.318713835511957