Year	current US$
1995	12658000000
1996	13815000000
1997	14151000000
1998	13384000000
1999	13999000000
2000	15125000000
2001	14634000000
2002	14257000000
2003	16309000000
2004	19267000000
2005	22746000000
2006	26068000000
2007	31101000000
2008	33843000000
2009	30225000000
2010	37225000000
2011	41247000000