Year Millions of 2000 Dollars 1973-01-01 15126.378910 1974-01-01 17039.810550 1975-01-01 17753.697270 1976-01-01 19726.150390 1977-01-01 21000.953130 1978-01-01 25079.849610 1979-01-01 24383.433590 1980-01-01 24462.628910 1981-01-01 31256.990230 1982-01-01 34319.433590 1983-01-01 26916.611330 1984-01-01 28307.511720 1985-01-01 31780.658200 1986-01-01 34966.718750 1987-01-01 38764.367190 1988-01-01 39055.035160 1989-01-01 39195.109380 1990-01-01 19997.593750 1991-01-01 7268.068359 1992-01-01 5650.162109 1993-01-01 5395.453613 1994-01-01 8555.039063 1995-01-01 9699.770508 1996-01-01 10169.310550 1997-01-01 10733.019530 1998-01-01 11897.951170 1999-01-01 10454.040040 2000-01-01 10025.317380 2001-01-01 9369.366211 2002-01-01 12552.916020 2003-01-01 15221.976560 2004-01-01 24518.695310 2005-01-01 26648.138670 2006-01-01 37088.128910 2007-01-01 49885.855470 2008-01-01 50736.792970 2009-01-01 52090.128910 2010-01-01 50229.566410 2011-01-01 49842.562500 2012-01-01 50109.066410 2013-01-01 55390.007810