Year current US$ 1975 19999.9995529652 1977 9999.99977648258 1985 19999.9995529652 2001 129999.995231628 2009 9999.99977648258 2010 259999.990463257 2011 3029999.97138977 2012 1590000.0333786 2013 7239999.771118159 2014 1990000.0095367401 2015 1559999.9427795399 2016 1509999.9904632599 2017 1139999.98569489 2018 629999.995231628 2019 340000.00357627904 2020 180000.00715255702 2021 19999.9995529652