Year	current US$
1987	3321.1826650465778
1988	4261.363636363636
1989	3902.0583357721202
1990	2300000000
1991	1800000000
1992	872499999.9999999
1993	162075782.53706756
1994	66536639.73251602
1995	108637058.36748256
1996	606497239.7791823
1997	626187591.5221579
1998	981803575.5786552
1999	740690742.5326633
2000	812717176.8277258
2001	976390352.8046321
2002	967833673.0162708
2003	1161326404.5860229
2004	1588219949.9165275
2005	2136731625.9119809
2006	2303035272.8802485
2007	3403308725.812515
2008	3542948982.8225536
2009	1505848294.539257
2010	2600846133.9069605
2011	3578003077.388311
2012	4397208552.509663
2013	3801347401.328644
2014	4608347043.921645
2015	4091723944.6500354
2016	4463954494.0793705
2017	4138842705.162934
2018	4999517656.342474
2019	4792023730.136209
2020	3939584300.7364054
2021	3898607532.0562577
2022	6012951958.027571
2023	7922179146.9032