Year	% of GDP
1975	7.537896825332904
1976	2.908484951818273
1977	5.131476096107455
1978	11.152297767894018
1979	22.675995160501138
1980	25.736137334560826
1981	26.773870511365537
1982	28.28235105013956
1983	26.69216755983478
1984	24.14533330330384
1985	23.703547206870994
1986	23.684090246521773
1987	24.16404001403951
1988	24.70399593424894
1989	23.580437180505527
1990	23.700491462285346
1991	23.612689563434326
1992	24.453690210742767
1993	25.61813857808732
1994	24.379273038111336
1995	20.831570554920898
1996	21.600540088967477
1997	22.202647594540743
1998	22.64724405523956
1999	23.386540046989417
2000	22.099655898192676
2001	22.95410178215402
2002	21.311268790082718
2003	21.656154950320115
2004	22.118897319308356
2005	24.162606175355165
2006	22.68688462944587
2007	23.626605923962916
2008	18.03312531164115
2009	23.9298756150558
2015	32.04356935444976
2016	34.46681260426984
2017	37.28564779703824
2018	35.123728070985514
2019	32.033618540301795
2020	31.355702385192064
2021	33.000789135934326
2022	27.13241178266759
2023	27.228182010958722