Year current US$ 1968 19999.9995529652 1969 29999.999329447703 1970 70000.0002980232 1971 39999.9991059303 1972 50000.0007450581 1973 159999.99642372102 1974 159999.99642372102 1975 250000 1976 349999.99403953605 1977 189999.99761581398 1978 490000.009536743 1979 509999.99046325695 1980 289999.99165535 1981 209999.993443489 1982 389999.98569488496 1983 109999.999403954 1984 230000.004172325 1985 50000.0007450581 1986 79999.9982118607 1987 150000.005960464 1988 119999.997317791 1989 59999.9986588955 1990 59999.9986588955 1991 90000.0035762787 1992 90000.0035762787 1993 280000.001192093 1994 29999.999329447703 1995 39999.9991059303 1996 200000.00298023198 1997 70000.0002980232 1998 79999.9982118607 1999 889999.985694885 2000 170000.00178813902 2001 29999.999329447703 2002 409999.99642372096 2003 39999.9991059303 2004 29999.999329447703 2005 219999.998807907 2006 219999.998807907 2007 19999.9995529652 2008 2349999.90463257 2009 1039999.96185303 2010 2589999.91416931 2011 3900000.09536743 2012 1500000 2013 90000.0035762787 2014 6449999.80926514 2015 7250000 2016 8289999.961853029 2017 5570000.17166138 2018 3470000.02861023 2019 5929999.82833862 2020 230000.004172325