Year	current US$
1996	40771000
1997	45709000
1998	49400000
1999	48600000
2000	252175940.912601
2001	273692698.822054
2002	112559795.755365
2003	157503054.341659
2004	218566190.584416
2005	379053687.812052
2006	480130050.063807
2007	550487314.653376
2008	1920429181.47452
2009	1586661134.03813
2010	1257366064.50216
2011	1505693369.41963
2012	1498595197.67679
2013	1604442120.94207
2014	1553480634.46155
2015	1335768739.25559
2016	1234945490.06786
2017	1274146124.40623
2018	1237349320.48535
2019	1142611838.12228
2020	1088349705.22204
2021	1317404608.00866
2022	1294166204.93777
2023	1228248724.99315