Year	current US$
1970	146464772.72727275
1971	249251136.36363637
1972	266143213.23362792
1973	416027959.61389107
1974	613046523.2616308
1975	555632400.7807417
1976	534844376.1321842
1977	738243073.3645095
1978	693401940.171886
1979	796232558.139535
1980	1018302276.138069
1981	1041784557.4596496
1982	1000967493.8266608
1983	647227607.1940361
1984	738853462.9910676
1985	689921701.2747033
1986	818568321.4853956
1987	1272250576.567073
1988	1416347003.3012507
1989	1187445382.158347
1990	1366495338.3272882
1991	1540738876.844819
1992	1427033011.9087546
1993	1170676565.6063619
1994	1138408664.5964508
1995	1295896351.4639437
1996	1541544421.0526316
1997	1648255930.8814838
1998	2199359722.5412674
1999	2117079475.7193236
2000	2250260850.208609
2001	1885826926.669445
2002	1846010514.7515266
2003	2433529194.7489862
2004	3434873738.6329155
2005	4865582335.821358
2006	6300126731.262467
2007	6403699695.574116
2008	4703261715.174552
2009	2015662326.5910914
2010	1912667218.3185148
2011	2372010242.71224
2012	2362580296.2598653
2013	2494489121.4319754
2014	3077464953.046431
2015	3398974484.601332
2016	4384008718.388342
2017	5376285014.739034
2018	5806119726.155318
2019	5102532344.838324
2020	4612888668.180742
2021	5913917093.123498
2022	6967587616.898071
2023	7565601153.345198