Year	Billions of United States Dollars
1960-01-01	22.84100
1961-01-01	22.68825
1962-01-01	24.96475
1963-01-01	26.13575
1964-01-01	28.10450
1965-01-01	31.52850
1966-01-01	37.05750
1967-01-01	39.91175
1968-01-01	46.55625
1969-01-01	50.49150
1970-01-01	55.76000
1971-01-01	62.34200
1972-01-01	74.21550
1973-01-01	91.15900
1974-01-01	127.46475
1975-01-01	122.72950
1976-01-01	151.14550
1977-01-01	182.44250
1978-01-01	212.24975
1979-01-01	252.67425
1980-01-01	293.82825
1981-01-01	317.75850
1982-01-01	303.18400
1983-01-01	328.63825
1984-01-01	405.10725
1985-01-01	417.22850
1986-01-01	452.86700
1987-01-01	508.71275
1988-01-01	553.99375
1989-01-01	591.03050
1990-01-01	629.72750
1991-01-01	623.54425
1992-01-01	667.79075
1993-01-01	719.97275
1994-01-01	813.42425
1995-01-01	902.57150
1996-01-01	963.96575
1997-01-01	1055.77400
1998-01-01	1115.68975
1999-01-01	1248.61200
2000-01-01	1471.30500
2001-01-01	1392.56475
2002-01-01	1424.14350
2003-01-01	1539.30325
2004-01-01	1796.70600
2005-01-01	2026.41775
2006-01-01	2243.53750
2007-01-01	2379.27950
2008-01-01	2560.14300
2009-01-01	1978.44725
2010-01-01	2360.18325
2011-01-01	2682.45625
2012-01-01	2759.85075
2013-01-01	2764.21025
2014-01-01	2879.28400
2015-01-01	2786.46125
2016-01-01	2738.14575
2017-01-01	2928.59650