Year	current US$
1960	8800000
1961	11400000
1962	23000000
1963	14400000
1964	14700000
1965	23700000
1966	30000000
1967	22320000
1968	33600000
1969	19210000
1970	13800000
1971	20100000
1972	69025166.9381957
1973	100580276.26875
1974	80551363.9439387
1975	58519880.1268056
1976	176210394.911539
1977	322376468.600015
1978	352408562.02169
1979	323128536.122339
1980	383788735.641646
1981	429989843.420036
1982	116286313.747903
1983	206915123.293425
1984	134418672.997205
1985	174230931.458699
1986	481552776.044916
1987	529995037.523585
1988	531980247.877165
1989	501345304.491813
1990	523510539.044828
1991	335763205.023674
1992	509361329.354985
1993	758418166.97963
1994	968571815.451903
1995	1150073104.16097
1996	1250958460.06511
1997	1556379147.8671
1998	2073227329.88602
1999	2081196552.6928
2000	2478856075.06834
2001	3097080334.44093
2002	769146323.559993
2003	2083171269.21285
2004	2508468406.37611
2005	3074054425.38084
2006	3085255595.54137
2007	4114322852.19685
2008	6352808823.24636
2009	8028641890.20913
2010	7643649477.93176
2011	10288750277.5462
2012	13590869948.3763
2013	16270614981.9754
2014	17544792291.8495
2015	15630229737.5794
2016	13467888236.1867
2017	15955048731.2397
2018	15552280400.0103
2019	14499003257.9047
2020	16244164853.0974
2021	16956810478.3003
2022	15120865214.3491
2023	16250083310.1785