Year	current US$
1968	2077777777.7777777
1969	2322222222.2222223
1970	2363636363.6363635
1971	2033333333.3333333
1972	3228571428.571429
1973	4078571428.571429
1974	5235714285.714286
1975	7421428571.428572
1976	9250000000
1977	11277777777.777777
1978	11220833333.333334
1979	13958064516.129032
1980	10943421052.631578
1981	10770270270.27027
1982	9730674846.625767
1983	9118666666.666666
1984	8628337874.6594
1985	10261685823.75479
1986	12967851851.85185
1987	21576546091.015167
1988	23725527426.160336
1989	24428275212.064087
1990	34454618627.82675
1991	35779482262.703735
1992	36588387660.06985
1993	46050659990.896675
1994	31956023506.366306
1995	40358272439.742615
1996	45530414593.69817
1997	50165424554.70319
1998	64713847977.171265
1999	50972259857.73061
2000	60924544199.712425
2001	36215311262.83874
2002	46787775821.27697
2003	65052513150.57449
2004	102944718025.55809
2005	133719528901.45232
2006	158604344070.1234
2007	190004409750.01746
2008	205336462925.7131
2009	144333146726.36713
2010	191409450583.52502
2011	232712990617.6584
2012	238264459206.87128
2013	271502355329.01068
2014	269903623051.32825
2015	255444198971.40045
2016	253149322596.50647
2017	256469439710.66843
2018	231876264950.69766
2019	197691237577.37073
2020	198253210432.0332
2021	230976190532.68506
2022	264542259774.99356
2023	358685014522.6991