Year	current US$
1975	15676352439.1047
1976	13150089032.8083
1977	15294140150.7177
1978	19657523750.3164
1979	23122053592.3491
1980	19325945383.2802
1981	11182398474.9203
1982	10569589625.1598
1983	8303912352.95623
1984	10842736321.4222
1985	12845414685.6563
1986	22260974260.5193
1987	29212069059.1249
1988	39302872411.2445
1989	42312813917.7624
1990	52802771281.3101
1991	53940746560.0707
1992	47684348414.8605
1993	36036405835.5848
1994	33810873739.5126
1995	55735848730.8011
1996	55952083523.0482
1997	56874384226.9363
1998	65210567243.6375
1999	62371661717.8566
2000	57946191711.9226
2001	59363115258.5699
2002	72230850263.1466
2003	96898702923.3605
2004	102270339204.568
2005	100122902604.713
2006	103601625956.301
2007	110300327913.056
2008	92909336851.4623
2009	68142030783.2722
2010	50949326066.1597
2011	35258350544.628
2012	33674701789.7868
2013	45080501815.421
2014	50054159980.7877
2015	64116112375.4635
2016	79290615583.6984
2017	90064518322.6466
2018	101178159620.273
2019	107434610407.371
2020	45558850130.1314
2021	67733240684.3718