Year	current US$
1988	426125800
1989	356133600
1990	368773800
1991	358174516.6901831
1992	170898839.55652678
1993	203703197.62932295
1994	139173681.36158523
1995	256955764.92691958
1996	329352863.38469404
1997	349005072.784096
1998	368684025.022278
1999	508794534.21638745
2000	501340860.27253973
2001	444869994.28051466
2002	390002091.18937194
2003	470293089.04302603
2004	509817233.0786778
2005	605106728.7396268
2006	689103494.4485459
2007	779237501.7797543
2008	917202441.2312441
2009	1034002204.1887157
2010	1016377274.1228346
2011	1311686714.7967398
2012	1323609594.1904943
2013	1567188286.7344236
2014	1662345565.9547591
2015	1747466805.1647727
2016	1632313490.515773
2017	1660793079.172327
2018	1768471542.6384158
2019	1585349842.8130815
2020	1016063243.7289615
2021	1490136140.368177
2022	1466106038.471796
2023	1046275696.281327