Year	current US$
1960	23600000
1961	26300000
1962	23300000
1963	24500000
1964	29940000
1965	28540000
1966	29690000
1967	30300000
1968	49410000
1969	44720000
1970	43020000
1971	69382899.96741
1972	58258900.1846359
1973	47013305.9998954
1974	390326808.383646
1975	750953201.787307
1976	1013547507.33818
1977	1481696972.99487
1978	1804814508.01326
1979	2140003704.45759
1980	2780798010.51705
1981	3347501964.93098
1982	3080526826.67725
1983	2104543501.2543
1984	1356689388.47214
1985	1128497803.16344
1986	474143192.298754
1987	187817409.808623
1988	127113456.95792
1989	246541448.73446
1990	492023899.218961
1991	338617037.863508
1992	172243751.289067
1993	206335148.266503
1994	352425995.068635
1995	358235037.043203
1996	543859059.692393
1997	706354686.218212
1998	783140098.420901
1999	945426887.513022
2000	1386299570.82216
2001	1907071561.96432
2002	2027717051.95554
2003	2451066519.15936
2004	3168213554.02602
2005	4960843331.04651
2006	6568285101.14595
2007	6694140170.07387
2008	9425353247.77815
2009	8756542041.77755
2010	9094269298.69022
2011	9885602173.5272
2012	9268028077.1765
2013	10102458463.7168
2014	11418655024.2323
2015	9861511400.35719
2016	9393846995.77485
2017	8289174890.25326
2018	7495229883.81699
2019	6834004192.70145
2020	6835740983.55519
2021	6765928821.83538
2022	6719179192.3007
2023	6126381288.82002