Year	% of GDP
1977	36.38789839648704
1978	30.469552122201463
1979	35.06330435497248
1980	37.53778545123775
1989	21.520874488197606
1990	23.052508440584493
1993	24.547228077698463
1994	23.345511256418334
1995	24.762992750261127
1996	26.85303336737273
1997	26.37145488131941
1998	22.184313528533618
1999	26.739421270648183
2000	30.055033601961497
2005	39.81236176042051
2006	41.40723680477469
2007	40.78403122456837
2008	42.851078779621
2009	31.43101075153755
2010	35.92402289692471
2011	39.612073108430906
2012	38.703589542420595
2013	36.797767928746424
2014	33.495210375218136
2015	25.302413391525516
2016	24.840793860852504
2017	28.32889829834341
2018	31.587855063682184
2019	29.806252172085152
2020	23.981998386453903
2021	29.104896940776502