Year	% of GDP
1970	0
1971	0
1972	14.3200051333712
1973	24.8845627417834
1974	27.6157379401918
1975	16.7021792019931
1976	15.8316270779181
1977	14.6150003347217
1978	14.7687215551994
1979	17.9406926284168
1980	19.7456920225018
1981	16.7948473795242
1982	14.5792214310405
1983	16.2826397993182
1984	12.3599179307786
1985	17.748898128058
1986	16.0548124486506
1987	19.6750647302122
1988	21.7265971309075
1989	20.2471987479531
1990	18.6714113029593
1991	14.258600885188
1992	11.8913381198435
1993	7.33531607724431
1994	8.48990339717761
1995	11.9915313110296
1996	4.98144246019828
1997	1.25610938457896
1998	4.06500351855718
1999	3.4217966175825
2000	6.70115973815214
2001	3.20688773881322
2002	6.34162533640631
2003	7.28731873407792
2004	14.2698811850806
2005	13.8116048148126
2006	14.9933922556165
2007	12.4080412371666
2008	12.7571740548352
2009	11.3523437597216
2010	19.3279074981138
2011	18.184302498514
2012	9.76136635013989
2013	5.67537595324957
2014	3.67301579213499
2015	1.80609932090663
2016	4.79215114126778
2017	5.73959585076772
2018	6.05432021367323
2019	3.10580299721339
2020	3.03260612895855
2021	14.4143020233093