Year current US$ 1983 9999.99977648258 1984 270000.010728836 1987 19999.9995529652 1988 129999.995231628 1992 819999.992847443 2016 0 2017 9999.99977648258 2018 9999.99977648258 2019 0 2020 59999.9986588955