Year current US$ 1970 389999.98569488496 1971 419999.986886978 1972 379999.99523162795 1973 219999.998807907 1974 389999.98569488496 1975 400000.00596046395 1976 159999.99642372102 1977 79999.9982118607 1978 189999.99761581398 1979 319999.99284744303 1980 730000.019073486 1981 500000 1982 540000.021457672 1983 540000.021457672 1984 560000.002384186 1985 490000.009536743 1986 409999.99642372096 1987 460000.00834465 1988 709999.978542328 1989 1029999.97138977 1990 1570000.05245209 1991 2529999.97138977 1992 1539999.96185303 1993 1960000.03814697 1994 3279999.97138977 1995 2650000.09536743 1996 4650000.09536743 1997 1929999.94754791 1998 1740000.0095367401 1999 970000.028610229 2000 970000.028610229 2001 879999.995231628 2002 779999.971389771 2003 930000.007152557 2004 1269999.98092651 2005 1090000.0333786 2006 959999.978542328 2007 829999.983310699 2008 1080000.04291534 2009 790000.021457672 2010 730000.019073486 2011 1019999.98092651 2012 530962.16917038 2013 724686.086177826 2014 1086312.0555877702 2015 1118064.88037109 2016 2087670.8030700702 2017 -122239.999473095 2018 1239943.26591492 2019 1565000.0572204601 2020 1134999.9904632599 2021 842999.994754791 2022 904999.971389771