Year current US$ 1981 9999.99977648258 1984 29999.999329447703 1986 9999.99977648258 1988 29999.999329447703 1994 9999.99977648258 1996 9999.99977648258 1997 9999.99977648258 1998 19999.9995529652 2014 159999.99642372102 2016 79999.9982118607 2017 129999.995231628 2018 200000.00298023198 2019 70000.0002980232 2020 0 2021 0 2022 79999.9982118607