Year	% of GDP
1970	2.74112553444977
1971	2.68505332797632
1972	9.2129250732725
1973	23.0550006711005
1974	56.6551762756192
1975	52.9310118193498
1976	55.2783051703255
1977	52.7272115263147
1978	49.1589692551152
1980	52.7396416550522
1981	35.9351425751176
1982	23.1195915132058
1983	30.3469179395202
1984	34.3361652000866
1985	30.03550300042
1986	22.9691135535257
1987	26.7855376176689
1988	19.0003232268832
1989	25.6466724918498
1990	30.6838382585785
1991	17.8487047904996
1992	19.1281731093251
1993	18.7936196786674
1994	16.0500449703665
1995	13.7981248795186
1996	16.06642734769
1997	14.8382113343604
1998	8.7864524447592
1999	14.7734214326029
2000	23.4896305488652
2001	16.742683402114
2002	16.1096999175722
2003	16.6876107710204
2004	19.7780085437059
2005	25.956729633831
2006	30.500356671909
2007	27.5236863460397
2008	26.3149392802544
2009	16.6918809538917
2010	20.3808570661645
2011	24.1925755555505
2012	20.2405416655378
2013	16.496289516532
2014	14.6726548413146
2015	7.67941403200076
2016	6.61076862656256
2017	8.33582039119995
2018	11.046476859895
2019	9.00049471310791
2020	3.45811781195258
2021	10.3734034426076