FILE PHOTO: Dariga Nazarbayeva, daughter of Kazakhstan's President Nursultan Nazarbayev and the country's Deputy Prime Minister, attends celebrations to mark Kazakhstan People's Unity Day in Almaty, Kazakhstan, May 1, 2016. REUTERS/Shamil Zhumatov/File photo

WikiLeaks founder Julian Assange makes a speech from the balcony of the Ecuadorian Embassy, in central London, Britain February 5, 2016. REUTERS/Peter Nicholls/File Photo

The logo of Mitsubishi Motors Corp is seen at its headquarters in Tokyo, Japan, April 21, 2016. REUTERS/Toru Hanai/File Photo

A worker arrives at his office in the Canary Wharf business district in London, Britain February 26, 2014. REUTERS/Eddie Keogh/File Photo

Oil tanks seen at the Saudi Aramco headquarters during a media tour at Damam city November 11, 2007. REUTERS/ Ali Jarekji/File Photo

German Economy Minister Sigmar Gabriel attends a cabinet meeting at the Chancellery in Berlin, Germany August 31, 2016. REUTERS/Stefanie Loos

European Union (EU) flags fly in front of the European Central Bank (ECB) headquarters in Frankfurt, Germany, December 3, 2015. REUTERS/Ralph Orlowski/File Photo

The headquarters of the European Central Bank (ECB) are pictured in Frankfurt, Germany September 8, 2016. REUTERS/Ralph Orlowski