Year current US$ 1981 579999.983310699 1982 1519999.98092651 1983 2339999.91416931 1984 2579999.92370605 1985 2900000.09536743 1986 3789999.96185303 1987 3349999.90463257 1988 -1789999.96185303 1989 -790000.021457672 1990 1450000.04768372 1991 1299999.95231628 1992 1710000.03814697 1993 -1820000.05245209 1994 -1340000.0333786 1995 -1850000.02384186 1996 -349999.99403953605 1997 -560000.002384186 1998 340000.00357627904 1999 1259999.9904632599 2000 1200000.04768372 2001 3319999.9332428 2002 270000.010728836 2003 29999.999329447703 2004 -740000.009536743 2005 180000.00715255702 2006 -879999.995231628 2007 -409999.99642372096 2008 4159999.8474121103 2009 -1100000.02384186 2010 -1379999.99523163 2011 -2119999.8855590797 2012 -2650000.09536743 2013 -2130000.1144409203 2014 -1899999.97615814 2015 -976224.005222321 2016 118427.537381649 2017 -820020.914077759 2018 3302700.04272461 2019 742349.9822616581 2020 2657654.52384949 2021 -244000.00274181398 2022 -374980.00264167803