Year	Billions of United States Dollars
1960-01-01	542.38225
1961-01-01	562.20975
1962-01-01	603.92150
1963-01-01	637.45150
1964-01-01	684.46150
1965-01-01	742.29025
1966-01-01	813.41375
1967-01-01	859.95625
1968-01-01	940.64650
1969-01-01	1017.61500
1970-01-01	1073.31050
1971-01-01	1164.84975
1972-01-01	1279.11200
1973-01-01	1425.37600
1974-01-01	1545.24250
1975-01-01	1684.90500
1976-01-01	1873.41250
1977-01-01	2081.82500
1978-01-01	2351.59875
1979-01-01	2627.32625
1980-01-01	2857.30850
1981-01-01	3207.04125
1982-01-01	3343.78925
1983-01-01	3634.03650
1984-01-01	4037.61400
1985-01-01	4338.98050
1986-01-01	4579.63250
1987-01-01	4855.21625
1988-01-01	5236.43800
1989-01-01	5641.57950
1990-01-01	5963.14450
1991-01-01	6158.12925
1992-01-01	6520.32725
1993-01-01	6858.55850
1994-01-01	7287.23650
1995-01-01	7639.74925
1996-01-01	8073.12175
1997-01-01	8577.55250
1998-01-01	9062.81675
1999-01-01	9630.66250
2000-01-01	10252.34650
2001-01-01	10581.82225
2002-01-01	10936.41825
2003-01-01	11458.24575
2004-01-01	12213.73025
2005-01-01	13036.63700
2006-01-01	13814.60900
2007-01-01	14451.85900
2008-01-01	14712.84500
2009-01-01	14448.93250
2010-01-01	14992.05200
2011-01-01	15542.58175
2012-01-01	16197.00725
2013-01-01	16784.85050
2014-01-01	17521.74700
2015-01-01	18219.29650
2016-01-01	18707.18875
2017-01-01	19485.39400