Year	Millions of 2011 U.S. Dollars
1995-01-01	176724
1996-01-01	184747
1997-01-01	183172
1998-01-01	182740
1999-01-01	185809
2000-01-01	193586
2001-01-01	199582
2002-01-01	203871
2003-01-01	211550
2004-01-01	221583
2005-01-01	236545
2006-01-01	253151
2007-01-01	267670
2008-01-01	275965
2009-01-01	263008
2010-01-01	270211
2011-01-01	274683