Year	US Dollars, Monthly Level
1960-01-01	2040077534.2340398
1961-01-01	2356667844.3632097
1962-01-01	2352495094.6475396
1963-01-01	2810110821.6498300
1964-01-01	3036760458.7479500
1965-01-01	3006687922.9587703
1966-01-01	3154930400.5848300
1967-01-01	3460310280.2465100
1968-01-01	3495510833.6989000
1969-01-01	4189466134.8161798
1970-01-01	4743452261.3482500
1971-01-01	5229296568.7004000
1972-01-01	6464807769.2094300
1973-01-01	9585122598.8234100
1974-01-01	11077060424.0446000
1975-01-01	12026892464.6001010
1976-01-01	13212302476.8244000
1977-01-01	13418265254.0439000
1978-01-01	14460201701.7341000
1979-01-01	18573956721.2770000
1980-01-01	21699667932.9589000
1981-01-01	21517017029.2092970
1982-01-01	21349614859.9045000
1983-01-01	20159041665.2953030
1984-01-01	23104143661.3006020
1985-01-01	22737987133.3062000
1986-01-01	22631762162.5719000
1987-01-01	26556044346.7308000
1988-01-01	33168191527.6599000
1989-01-01	37144102396.8051000
1990-01-01	39705421634.4756000
1991-01-01	41814268041.0636000
1992-01-01	42704582738.3816000
1993-01-01	42578097413.9388000
1994-01-01	47386903215.6484000
1995-01-01	53119751778.3964000
1996-01-01	60197708201.8329000
1997-01-01	62871341552.5123000
1998-01-01	55891655091.6734000
1999-01-01	55993211893.5869100
2000-01-01	63770494909.2817000
2001-01-01	63285418781.0470000
2002-01-01	64970153304.2625960
2003-01-01	70356721312.3213000
2004-01-01	86352173406.9910000
2005-01-01	105742294239.2670000
2006-01-01	123386620635.2140000
2007-01-01	141186002958.1210000
2008-01-01	185418241874.5579800
2009-01-01	154461684311.6980000
2010-01-01	211634963866.9480000
2011-01-01	269750109493.1540200
2012-01-01	257871926099.4830000
2013-01-01	253364149201.4450000
2014-01-01	240243059375.2210000
2015-01-01	187886507100.6100200
2016-01-01	191460355292.9069800
2017-01-01	230820518885.3500000