Year	US Dollars, Monthly Level
1992-01-01	80584000000
1993-01-01	103959000000
1994-01-01	115614000000
1995-01-01	132084000000
1996-01-01	138835000000
1997-01-01	142371000000
1998-01-01	140237000000
1999-01-01	165699000000
2000-01-01	225099000000
2001-01-01	243572000000
2002-01-01	295310000000
2003-01-01	413095000000
2004-01-01	561220000000
2005-01-01	659980000000
2006-01-01	791794000000
2007-01-01	955950000000
2008-01-01	1132567000000
2009-01-01	1005922000000
2010-01-01	1396248000000
2011-01-01	1743483000000
2012-01-01	1817781737000
2013-01-01	1949300326000
2014-01-01	1963105203000
2015-01-01	1680786147000
2016-01-01	1589463350000
2017-01-01	1842333868000