Year	US Dollars, Monthly Level
1990-01-01	529903619362.2460
1991-01-01	522820009719.5080
1992-01-01	564301201371.6700
1993-01-01	560038712814.4640
1994-01-01	641225867833.6500
1995-01-01	787126089557.2471
1996-01-01	824434305393.1510
1997-01-01	840958644563.9661
1998-01-01	865113801096.0600
1999-01-01	859419120027.1951
2000-01-01	914770246907.1649
2001-01-01	942853473274.4260
2002-01-01	1012516260108.8700
2003-01-01	1185670484479.3000
2004-01-01	1412942053197.8801
2005-01-01	1531689736650.8098
2006-01-01	1738576166540.4800
2007-01-01	2059811796390.7798
2008-01-01	2282647678289.7600
2009-01-01	1782719984768.9802
2010-01-01	2033378160167.4600
2011-01-01	2422248062993.2500
2012-01-01	2418390720869.1797
2013-01-01	2521453211828.1800
2014-01-01	2575297219426.7100
2015-01-01	2260180913495.4400
2016-01-01	2261079806611.9700
2017-01-01	2476177698314.4700