Year	US Dollars, Monthly Level
1960-01-01	4044609684.3714604
1961-01-01	4221760630.3135600
1962-01-01	4885722915.6879200
1963-01-01	5403835573.3160500
1964-01-01	6583414630.1159500
1965-01-01	8398750985.6584810
1966-01-01	9689777845.1810000
1967-01-01	10360276267.7937010
1968-01-01	12895886318.6255990
1969-01-01	15995513153.6500000
1970-01-01	19355612708.3848000
1971-01-01	24015715883.7279000
1972-01-01	28458357142.8571000
1973-01-01	36870120454.5805000
1974-01-01	55189788242.7640000
1975-01-01	55882064067.5252000
1976-01-01	67148800845.7396000
1977-01-01	81033592865.4099000
1978-01-01	98327874541.3320000
1979-01-01	102057473676.0060000
1980-01-01	129932360418.7200200
1981-01-01	151487513662.4680000
1982-01-01	138875538567.0100000
1983-01-01	146818948678.0350000
1984-01-01	169512696400.1100200
1985-01-01	176870382928.8030000
1986-01-01	210537786935.8540000
1987-01-01	231257034693.3980000
1988-01-01	265021072963.7079800
1989-01-01	274373037072.6859700
1990-01-01	287685580011.3350000
1991-01-01	315767001091.6820000
1992-01-01	340211757283.8680000
1993-01-01	361981780309.6570000
1994-01-01	396572019373.1889600
1995-01-01	442192288969.5810000
1996-01-01	410659064179.6270000
1997-01-01	421288863873.9550000
1998-01-01	388831190792.1059600
1999-01-01	419230991211.0660000
2000-01-01	478430527514.7740000
2001-01-01	403873403908.9320000
2002-01-01	415482894118.8420400
2003-01-01	470757968580.8880000
2004-01-01	563615845091.4750000
2005-01-01	594881522419.2270000
2006-01-01	646913487778.0450000
2007-01-01	716247627492.3319000
2008-01-01	782407013650.9819000
2009-01-01	580511061462.6171000
2010-01-01	769595116538.2540000
2011-01-01	824219581929.1550000
2012-01-01	798022000510.0160000
2013-01-01	715719678061.3180000
2014-01-01	690638890242.9330000
2015-01-01	625042463716.4270000
2016-01-01	642007308821.0859000
2017-01-01	698503717922.2900000