Year current US$ 1977 239999.994635582 1980 439999.997615814 1981 400000.00596046395 1982 250000 1983 200000.00298023198 1984 310000.002384186 1985 529999.971389771 1986 230000.004172325 1987 140000.000596046 1988 239999.994635582 1989 209999.993443489 1990 209999.993443489 1991 610000.014305115 1992 250000 1993 250000 1994 340000.00357627904 1995 879999.995231628 1996 469999.998807907 1997 680000.007152557 1998 300000.011920929 1999 250000 2000 200000.00298023198 2001 200000.00298023198 2002 629999.995231628 2003 349999.99403953605 2004 519999.980926514 2005 550000.011920929 2006 600000.023841858 2007 759999.990463257 2008 1179999.94754791 2009 1230000.01907349 2010 1250000 2011 1340000.0333786 2012 1608129.02450562 2013 1468512.05825806 2014 1246979.47502136 2015 894810.736179352 2016 731345.117092133 2017 704301.118850708 2018 650699.973106384 2019 991902.887821198 2020 1036509.99069214 2021 1209537.86373138 2022 1019260.04886627