Year	US Dollars, Monthly Level
1993-01-01	5448109861.616440
1994-01-01	6739715392.390440
1995-01-01	8565021696.599440
1996-01-01	8811388063.452099
1997-01-01	9604021613.897040
1998-01-01	10734586067.281898
1999-01-01	6954805281.034370
2000-01-01	8387192980.994410
2001-01-01	8759298393.284811
2002-01-01	10180145731.057200
2003-01-01	15933988094.462700
2004-01-01	20756616957.173702
2005-01-01	24782861429.658802
2006-01-01	34126506881.135597
2007-01-01	52273700329.328600
2008-01-01	68529956173.588900
2009-01-01	56022912927.061000
2010-01-01	64342448746.019400
2011-01-01	79630945402.279900
2012-01-01	80511226723.572190
2013-01-01	85500853267.240200
2014-01-01	86765904511.053910
2015-01-01	75221001102.386600
2016-01-01	77276161191.500290
2017-01-01	84678594849.284300