Year	current US$
1987	2500000000
1988	2700000000
1989	2800000000
1990	3000000000
1991	2950000000
1992	3200000000
1993	3180952380.9523807
1994	2560939794.4199705
1995	2482249252.850589
1996	2378759975.4450583
1997	2450350625.104074
1998	2605689134.4904246
1999	2450564100.182922
2000	2904663310.9824967
2001	3534772732.3974595
2002	4462029108.723494
2003	5977440582.801714
2004	6838351088.466884
2005	8103901996.370235
2006	10276674364.896074
2007	12664165103.189493
2008	19271523178.807945
2009	20214385964.91228
2010	22583157894.736843
2011	29233333333.333332
2012	35164210526.31579
2013	39197543859.649124
2014	43524210526.31579
2015	35799714285.71429
2016	36169428571.42857
2017	37926285714.28571
2018	40765428571.42857
2019	45232857142.85714
2020	45818000000
2021	50007428571.42857
2022	56542857142.85714
2023	59887334844.06514