Year	current US$
1994	13555370000
1995	19044250000
1996	27105162100
1997	42749400700
1998	28268830000
1999	18084590000
2001	17235170000
2002	13429560000
2003	21613110000
2004	12683970000
2005	20055420000
2006	25696370000
2007	49166860000
2008	56704420000
2009	71442300000
2010	76735497000
2011	73760477000
2012	87638267000
2013	55355440000
2014	52677945000
2015	38919825000
2016	46033361000
2017	53457460000
2018	32895800000
2019	38002910000
2020	30001130000
2021	21450620000
2022	25788410000