Year	current US$
1988	549013499480.7892
1989	502122015915.11926
1990	515901284109.1493
1991	516525925925.9259
1992	395537530266.3438
1993	401535514967.02185
1994	377049744485.413
1995	382102115405.91425
1996	372853909786.1714
1997	396006914433.88074
1998	247017001545.59503
1999	162510154346.0601
2000	207696409527.19516
2001	269108673294.4806
2002	307923444976.07654
2003	384914322205.8499
2004	521929885456.4388
2005	663859658253.1132
2006	864570494353.3068
2007	1172858050623.4255
2008	1531798634966.7795
2009	1153559767662.356
2010	1415549931564.2842
2011	1887797163609.2578
2012	2075085949725.2107
2013	2180427993164.2112
2014	1939418378768.9717
2015	1262501917943.9968
2016	1210510336199.483
2017	1490684343386.2559
2018	1491502866377.0789
2019	1563793055349.6392
2020	1417265520954.5515
2021	1654910847024.5454
2022	2006100844766.7224
2023	1899597059759.3237