Year	current US$
1995	2398000000
1996	2561000000
1997	2671000000
1998	2535000000
1999	2500000000
2000	2687000000
2001	2673000000
2002	2535000000
2003	2972000000
2004	3743000000
2005	4719000000
2006	5452000000
2007	6458000000
2008	6618000000
2009	6035000000
2010	7248000000
2011	7848000000