Year current US$ 1968 409999.99642372096 1969 180000.00715255702 1970 170000.00178813902 1977 -19999.9995529652 1978 -19999.9995529652 1979 -19999.9995529652 1980 -19999.9995529652 1981 50000.0007450581 1982 289999.99165535 1983 349999.99403953605 1984 300000.011920929 1985 189999.99761581398 1986 70000.0002980232 1987 289999.99165535 1988 250000 1989 379999.99523162795 1990 250000 1991 400000.00596046395 1992 159999.99642372102 1993 189999.99761581398 1994 449999.988079071 1995 150000.005960464 1996 300000.011920929 1997 230000.004172325 1998 189999.99761581398 1999 180000.00715255702 2000 19999.9995529652 2001 230000.004172325 2002 889999.985694885 2003 1559999.9427795399 2004 2049999.9523162802 2005 3150000.09536743 2006 879999.995231628 2007 3329999.92370605 2008 949999.988079071 2009 2200000.04768372 2010 479999.989271164 2011 1509999.9904632599 2012 109999.999403954 2013 509999.99046325695 2014 509999.99046325695 2015 360000.01430511504 2016 680000.007152557 2017 689999.997615814 2018 589999.973773956 2019 870000.004768372 2020 189999.99761581398 2021 180000.00715255702 2022 409999.99642372096