Year	current US$
1992	8663050000
1993	14734540000
1994	11597470000
1995	16580350000
1996	23515762100
1997	41345900700
1998	27191930000
1999	17211740000
2000	23322880000
2001	15895870000
2002	12869210000
2003	19907380000
2004	12474670000
2005	14996400000
2006	22313480000
2007	45037850000
2008	53225170000
2009	68584370000
2010	68822667000
2011	70813610000
2012	74373247000
2013	52648300000
2014	46598120000
2015	35436935000
2016	42908041000
2017	43111270000
2018	28556470000
2019	31539200000
2020	20469360000
2021	17294470000
2022	20680920000