Year	current US$
1987	5972804.546
1988	6836565.018
1989	9275733.948
1990	5970436.096
1991	1552868.009
1992	279829.0849
1993	28537929.53
1994	41800518.04
1995	80575032.9230049
1996	122450105.270511
1997	147205581.007985
1998	135822962.755218
1999	135053917.971651
2000	102152604.79581
2001	116158175.616502
2002	105385646.322992
2003	84412131.6914657
2004	116573115.83633
2005	129488927.894728
2006	115168164.055078
2007	81009057.8890696
2008	54744020.1698431
2009	54472032.2248621
2010	114854849.288762
2011	127075981.133091
2012	274616061.700335
2013	1643883378.07428
2014	1807677675.0137
2015	1933727555.49391
2016	2254714796.43757
2017	2452869388.04774
2018	2673495005.35447
2019	2553189788.15473
2020	2671564197.66884
2021	1282095273.68297
2022	1260825013.02677
2023	1500000000