Year	current US$
1981	1208968266.6666667
1982	1157667166.6666667
1983	1537248600
1984	1170169725
1985	1212821900
1986	1743009266.6666667
1987	1958027100
1988	2090430800
1989	1929259700
1990	1302120000
1991	1309126315.7894738
1992	636199530.5164319
1993	342152885.58893013
1994	375668491.95580536
1995	777879226.9454538
1996	787118232.3947899
1997	637706173.495867
1998	658046093.696512
1999	618392590.8238637
2000	853894599.3763549
2001	958320052.4734728
2002	1077039992.2508137
2003	1118687947.0406616
2004	1291772441.364066
2005	1392331362.655409
2006	1614945010.6376145
2007	2058509231.1703782
2008	3162111397.4796762
2009	2678591537.180196
2010	3969815304.9825535
2011	5359604457.829016
2012	6517483315.9003525
2013	7020658397.463134
2014	6924120623.323017
2015	7192706603.795648
2016	6790003077.357433
2017	6459632701.109088
2018	7637417028.175605
2019	8134879145.96325
2020	8050570296.465739
2021	8102208268.220663
2022	8892189448.10451
2023	9506528592.397308