Year	US Dollars, Monthly Level
1960-01-01	-450478954.92657804
1961-01-01	-1565849497.91500000
1962-01-01	-734718789.53506200
1963-01-01	-1310135173.99599000
1964-01-01	-1312211279.40160010
1965-01-01	261777050.31142402
1966-01-01	226605166.54619900
1967-01-01	-1231812921.19524000
1968-01-01	-73442673.72356360
1969-01-01	899051953.35091100
1970-01-01	382807217.56222004
1971-01-01	4189913082.51902960
1972-01-01	4981194805.19481000
1973-01-01	-1418353556.51120000
1974-01-01	-6641848441.59566000
1975-01-01	-1963776118.87834000
1976-01-01	2189315262.65327000
1977-01-01	9517116932.47401000
1978-01-01	18457657777.48600000
1979-01-01	-8305202980.20369100
1980-01-01	-11736219608.56890100
1981-01-01	8974364578.98353000
1982-01-01	7383564112.80812900
1983-01-01	20384757897.42560200
1984-01-01	33414748105.46459600
1985-01-01	45806539871.47490000
1986-01-01	82036913900.80760000
1987-01-01	80598579298.53620000
1988-01-01	77584089046.78160000
1989-01-01	64413840344.70300000
1990-01-01	52858616321.96680000
1991-01-01	78057257258.77020000
1992-01-01	106542106342.19300000
1993-01-01	119975049274.97600000
1994-01-01	120700817759.07500000
1995-01-01	104939090528.12999000
1996-01-01	61345347785.13330000
1997-01-01	82524513318.89981000
1998-01-01	108896920634.40300000
1999-01-01	107751950108.27300000
2000-01-01	98287399272.24960000
2001-01-01	54728386855.52820000
2002-01-01	77491694848.46810000
2003-01-01	87283386914.86760000
2004-01-01	109980528092.26900000
2005-01-01	75548353807.74740000
2006-01-01	68050069585.21280000
2007-01-01	92205981769.00540000
2008-01-01	20336644300.02140000
2009-01-01	28673161006.22390000
2010-01-01	75195707492.72400000
2011-01-01	-33581571767.56620400
2012-01-01	-85268853722.66980000
2013-01-01	-116582550935.06900000
2014-01-01	-120194655217.33499000
2015-01-01	-23137568583.30880000
2016-01-01	34166383366.32539700
2017-01-01	25591859479.67410000