Year	US Dollars, Monthly Level
1960-01-01	1875231646.1606200
1961-01-01	2045302872.2525000
1962-01-01	2212841483.3793400
1963-01-01	2410667241.2162200
1964-01-01	2640667092.7382800
1965-01-01	2963032746.6966800
1966-01-01	3284004911.0808800
1967-01-01	3506199387.1954603
1968-01-01	4002532887.3579100
1969-01-01	4621101551.2771000
1970-01-01	5120338037.3223200
1971-01-01	5741486315.3099190
1972-01-01	6862493988.0152700
1973-01-01	9497164805.1030000
1974-01-01	11901490285.5572990
1975-01-01	12933051186.4281000
1976-01-01	14763688345.1569000
1977-01-01	17655598987.8718030
1978-01-01	23608406007.4745000
1979-01-01	26473729525.8775000
1980-01-01	28893464921.0790020
1981-01-01	26908917976.3467980
1982-01-01	25976515141.2105000
1983-01-01	25597495752.7660030
1984-01-01	25852379677.5904000
1985-01-01	27365510196.7962000
1986-01-01	37386462801.5762000
1987-01-01	45389751577.7694000
1988-01-01	50587536819.3522000
1989-01-01	51620094098.2074050
1990-01-01	58416788018.8095000
1991-01-01	57386002604.1689000
1992-01-01	61274552592.7335000
1993-01-01	58610108402.2101000
1994-01-01	66303131691.7278000
1995-01-01	78083538071.5561000
1996-01-01	75998818328.5479000
1997-01-01	72419732808.2835000
1998-01-01	75296360591.2876000
1999-01-01	76057432205.1270000
2000-01-01	75116974336.1771000
2001-01-01	78111851949.6303100
2002-01-01	87463284297.5923000
2003-01-01	100710232629.8280000
2004-01-01	117603176747.4410000
2005-01-01	126390893204.9980000
2006-01-01	142116307895.1460000
2007-01-01	164685967103.0910000
2008-01-01	190671744331.9520000
2009-01-01	166842230538.5410200
2010-01-01	185860824368.6840200
2011-01-01	223913521358.6210000
2012-01-01	214060715779.8050200
2013-01-01	216816597773.9490000
2014-01-01	227616658754.9100000
2015-01-01	210574915184.7270000
2016-01-01	214140168502.4760000
2017-01-01	224438513630.4100000