Year	current US$
1997	4407207205985.041
1998	4330054266131.124
1999	4487667368256.987
2000	4542292736978.388
2001	4217297232543.786
2002	4270128349624.469
2003	4733094990111.455
2004	5228481338698.953
2005	5414604850791.494
2006	5634788404352.782
2007	6096642870587.748
2008	6242830912817.403
2009	5475221082861.333
2010	5969686058696.941
2011	6377290202449.346
2012	6296313516945.172
2013	6235934535756.69
2014	6338183811763.211
2015	6025084855006.886
2016	6127597359679.434
2017	6387764984023.653
2018	6762077034884.73
2019	6653054194297.088
2020	6361547251429.434
2021	7091118041097.705