Year	current US$
1988	2575067800
1989	2618652000
1990	3179097800
1991	3293514600.895782
1992	2150467975.989531
1993	2126638677.4796953
1994	2342960439.881073
1995	2630204735.7223773
1996	2600354297.4159822
1997	3053748017.719195
1998	3378155308.9583364
1999	3728061047.1870794
2000	7094006564.1485
2001	6678346260.892213
2002	6384253011.683814
2003	5172028172.321566
2004	6429683081.061732
2005	7587961055.93736
2006	7994831482.848637
2007	9982677242.473728
2008	11053218812.900818
2009	11905169917.8483
2010	12166772723.267366
2011	13399085505.44333
2012	14180362741.98767
2013	15169623156.80523
2014	15729283882.736805
2015	15491959967.050753
2016	14696999277.607885
2017	15547507195.801517
2018	17594064096.11577
2019	15586007505.749655
2020	15147858705.006025
2021	21943238895.83937
2022	21507224633.46217
2023	21119352759.188503