Year	current US$
1997	4599999.90463257
1998	4800000.19073486
1999	4900000.09536743
2000	5300000.19073486
2001	5400000.09536743
2002	5300000.19073486
2003	5500000
2004	6699999.80926514
2005	6900000.09536743
2006	7000000
2007	7000000
2008	7099999.90463257
2009	26000000
2010	28000000
2011	27000000
2012	30000000
2013	29000000
2014	29000000