Year	current US$
1988	116381201.17
1989	321161290.32258064
1990	277044712.56210077
1991	368947269.8323499
1992	309280000
1993	390701729.41427654
1994	507398801.1126151
1995	665034457.1670908
1996	725800450.4771502
1997	852511351.488659
1998	896219922.6981922
1999	899831429.4666069
2000	1027443592.1289142
2001	1019079053.8367771
2002	984524710.0264537
2003	1101970459.3302703
2004	1335845895.1384182
2005	1541276323.259608
2006	2114797951.052931
2007	2454454291.6768303
2008	2928933145.4323015
2009	2820029990.9043975
2010	3544323949.729355
2011	4400092756.518599
2012	4999469140.049349
2013	4965861472.001554
2014	5347144909.838244
2015	5113329517.771712
2016	5165892177.072779
2017	5698930814.052158
2018	5506731488.406881
2019	5689744185.835873
2020	5312779358.280361
2021	6593585624.520202
2022	7800994581.094039
2023	8165537907.642997