Year	current US$
1996	714334362962.452
1997	614307127983.329
1998	480958568732.27
1999	454635606884.118
2000	520574602191.513
2001	395357373838.87
2002	316394630756.329
2003	362447069441.069
2004	433027658396.019
2005	427328191676.997
2006	397939949214.845
2007	406318382061.432
2008	311362574884.963
2009	94690974254.6749
2010	230082367577.468
2011	205095165980.862
2012	194426650644.868
2013	178171537377.465
2014	179192327025.727
2015	282874222717.734
2016	356384569511.406
2017	378017082466.998
2018	360715127293.841
2019	357044862469.671
2020	251311379064.054
2021	185946715861.798