Year	current US$
1965	19950000
1966	52400000
1967	75830000
1968	100050000
1969	169660000
1970	219830000
1971	170946360.160737
1972	201994376.018234
1973	233042427.209654
1974	193277290.761395
1975	173401676.388286
1976	275518273.289747
1977	522391861.446834
1978	352578641.98426
1979	627713448.786228
1980	491699563.84167
1981	231127406.489196
1982	211665072.327518
1983	376003533.505212
1984	389801536.981152
1985	390646485.061511
1986	413320415.152961
1987	255794587.808027
1988	263736508.726837
1989	284644878.702657
1990	205411405.443087
1991	116938776.123246
1992	52972565.8971221
1993	405590938.024012
1994	557578202.921739
1995	353419653.553888
1996	746479743.91745
1997	787949466.776046
1998	783051364.305175
1999	791589617.767127
2000	897735792.728211
2001	1064856615.82776
2002	1067969162.34882
2003	1481908533.64118
2004	1519319696.93683
2005	1798831412.82813
2006	2415755392.93319
2007	3355002140.79063
2008	2878516480.48375
2009	3848957058.92698
2010	4320155749.01272
2011	4264380209.81446
2012	5710999324.95431
2013	6598159168.91412
2014	7873690832.36248
2015	7514228907.05536
2016	7553197372.6237
2017	7324642163.33911
2018	8163611816.22987
2019	9114892205.21186
2020	8296128898.90541
2021	9489876378.4777
2022	7968472154.57849
2023	7340620173.39666