Year current US$ 1978 19999.9995529652 1979 19999.9995529652 1980 119999.997317791 1981 9999.99977648258 1982 39999.9991059303 1983 29999.999329447703 1985 50000.0007450581 2011 70000.0002980232 2012 59999.9986588955 2013 70000.0002980232 2014 239999.994635582 2015 29999.999329447703 2016 9999.99977648258 2017 9999.99977648258 2018 0 2019 59999.9986588955 2020 19999.9995529652 2021 0 2022 0