Year	US Dollars, Monthly Level
1992-01-01	83037626596.80249
1993-01-01	89160005175.11810
1994-01-01	117546706370.06100
1995-01-01	148783394351.16300
1996-01-01	150020918458.12300
1997-01-01	182381892950.84500
1998-01-01	184613623699.95800
1999-01-01	194512301058.33698
2000-01-01	250489282187.18900
2001-01-01	267876784350.91300
2002-01-01	325044565635.02203
2003-01-01	436910313785.41700
2004-01-01	590730221185.67800
2005-01-01	762183161746.46400
2006-01-01	968297948489.82200
2007-01-01	1219190996133.66020
2008-01-01	1426868813667.27000
2009-01-01	1199769702563.32980
2010-01-01	1578428280553.85000
2011-01-01	1895944739979.61990
2012-01-01	2049372395130.88000
2013-01-01	2213329622947.23000
2014-01-01	2322271798632.65040
2015-01-01	2297244083734.59000
2016-01-01	2141784145673.57000
2017-01-01	2275921113501.69970