Year	US Dollars, Monthly Level
1990-01-01	187488586040.43300
1991-01-01	198722812129.16900
1992-01-01	204847457343.94500
1993-01-01	180439711318.08398
1994-01-01	205220993128.91800
1995-01-01	245717398462.70400
1996-01-01	252959064843.02100
1997-01-01	257804343136.80700
1998-01-01	267661668742.98300
1999-01-01	279372219510.02997
2000-01-01	315386421611.95900
2001-01-01	304412385509.61600
2002-01-01	310863825856.36800
2003-01-01	373574568423.28204
2004-01-01	446800144479.62300
2005-01-01	511074998882.27500
2006-01-01	594099139531.27890
2007-01-01	690288970279.55200
2008-01-01	791354934889.06300
2009-01-01	590010998615.13210
2010-01-01	685664628349.33600
2011-01-01	818355515628.70800
2012-01-01	770885491639.99400
2013-01-01	773100504930.70010
2014-01-01	777624446622.60000
2015-01-01	665860822807.01500
2016-01-01	656294729390.96100
2017-01-01	738333487330.02900