Year	current US$
1992	3600000000
1993	4616666666.666667
1994	4039495798.3193274
1995	3908400460.2991943
1996	4361846153.846154
1997	4295608628.659476
1998	4486798179.05918
1999	3422547131.9695144
2000	3444472333.779563
2001	3286330935.251798
2002	3790063207.7368054
2003	4751105412.7443
2004	6606982492.8480835
2005	7655885821.47069
2006	9240403625.918604
2007	11276793036.606277
2008	15907554765.025276
2009	11424786523.692736
2010	12882951542.885538
2011	16319002619.29028
2012	16278952608.283653
2013	16612856909.589472
2014	16619555755.518822
2015	11654534506.175125
2016	9617187291.88269
2017	11836414050.928873
2018	12761532149.461525
2019	13938348289.473621
2020	13186723097.260794
2021	15856696898.972889
2022	17701686912.151096
2023	16533792209.087734