Year	current USD
1997	3335766741.48489
1998	4010347174.94894
1999	4233083730.4288597
2000	5875833900.612659
2001	5797957794.41797
2002	5354118447.92376
2003	5834717494.89449
2004	6816882232.81144
2005	6604220558.20286
2006	7165418652.14432
2007	8460993873.383249
2008	11571681415.929201
2009	13836351259.360102
2010	17504697072.8387
2011	19181756296.8005
2012	19024098025.8679
2013	23561061946.902702
2014	22755071477.1954