Year current US$ 1972 29999.999329447703 1973 39999.9991059303 1974 50000.0007450581 1975 1470000.02861023 1976 670000.016689301 1977 239999.994635582 1978 150000.005960464 1979 119999.997317791 1980 79999.9982118607 1981 59999.9986588955 1982 9999.99977648258 1983 39999.9991059303 1984 29999.999329447703 1985 29999.999329447703 1986 29999.999329447703 1987 70000.0002980232 1989 100000.00149011599 1990 140000.000596046 1991 50000.0007450581 1992 39999.9991059303 1993 70000.0002980232 1994 159999.99642372102 1995 430000.00715255697 1996 209999.993443489 1997 600000.023841858 1998 289999.99165535 1999 479999.989271164 2000 330000.013113022 2001 379999.99523162795 2002 680000.007152557 2003 469999.998807907 2004 899999.976158142 2005 3390000.10490417 2006 1470000.02861023 2007 1710000.03814697 2008 1009999.99046326 2009 1470000.02861023 2010 189999.99761581398 2011 1110000.01430511 2012 1129999.99523163 2013 1090000.0333786 2014 670000.016689301 2015 579999.983310699 2016 1539999.96185303 2017 1240000.0095367401 2018 1230000.01907349 2019 1379999.99523163 2020 860000.014305115 2021 649999.976158142 2022 1309999.9427795399