Year current US$ 1971 19999.9995529652 1972 259999.990463257 1973 409999.99642372096 1974 150000.005960464 1975 29999.999329447703 1976 19999.9995529652 1980 19999.9995529652 1982 19999.9995529652 1983 19999.9995529652 1984 39999.9991059303 1985 50000.0007450581 1986 79999.9982118607 1987 59999.9986588955 1988 129999.995231628 1989 289999.99165535 1990 5550000.19073486 1991 1389999.98569489 1992 550000.011920929 1993 189999.99761581398 1994 -419999.986886978 1995 -379999.99523162795 1996 -469999.998807907 1997 -490000.009536743 1998 -569999.992847443 1999 -670000.016689301 2000 -620000.004768372 2001 50000.0007450581 2002 59999.9986588955 2003 129999.995231628 2004 129999.995231628 2005 119999.997317791 2006 70000.0002980232 2007 170000.00178813902 2008 330000.013113022 2009 209999.993443489 2010 819999.992847443 2011 300000.011920929 2012 639999.985694885 2013 490000.009536743 2014 289999.99165535 2015 209999.993443489 2016 270000.010728836