Year current US$ 2011 50000.0007450581 2013 95159.9776744843 2014 26024.309918284398 2015 80569.326877594 2016 13597.699813544801 2017 72047.9562878609 2018 12264.8496180773 2019 62949.1880536079 2020 29785.4691743851 2021 71299.9999523163