Year current US$ 1977 9999.99977648258 1981 9999.99977648258 1982 29999.999329447703 1991 9999.99977648258 1992 19999.9995529652 1993 9999.99977648258 1994 19999.9995529652 2000 19999.9995529652 2001 29999.999329447703 2002 29999.999329447703 2004 29999.999329447703 2008 29999.999329447703 2009 70000.0002980232 2010 180000.00715255702 2011 370000.00476837205 2012 1379999.99523163 2013 819999.992847443 2014 1009999.99046326 2015 370000.00476837205 2016 150000.005960464 2017 460000.00834465 2018 109999.999403954 2019 140000.000596046 2020 39999.9991059303 2021 59999.9986588955 2022 50000.0007450581