Year	current US$
1970	5848.97240890019
1971	4381.5665600923
1972	6184.89793964098
1973	16723.5045796642
1974	14663.1306462316
1975	14348.5035035188
1976	17803.589320066
1977	25535.5207150432
1978	20238.7140491933
1979	28034.6132404181
1980	31591.4821512741
1981	20155.6743859649
1982	17909.1460618146
1983	18571.9710867398
1984	14520.8470588235
1985	14545.3176470588
1986	23790
1987	24312.6
1988	24905.4
1989	25498.2
1990	25950.6
1991	29796.3466666667
1992	41299.4869805587
1993	33854.4715305938
1994	46039.0884739027
1995	77377.6528568524
1996	83299.4635877914
1997	74210.7609454853
1998	61220.6701449276
1999	33327.4867078874
2000	33241.1833940556
2001	39302.3452878706
2002	44742.5876211782
2003	66137.1997282641
2004	74652.5393449022
2005	91879.6735038255
2006	116937.962903376
2007	166540.927224846
2008	244666.787244867
2009	222574.306243479
2010	229434.08773925
2011	276682.683975055
2012	250822.549756244
2013	237496.554926604
2014	329581.822586915
2015	255857.568187601
2016	280342.826575817
2017	341314.791964167
2018	218730.529154744
2019	200794.901303957
2020	231649.179589536
2021	216159.603898934