World Bank President Jim Yong Kim speaks at a panel discussion on Building Human Capital during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

International Monetary Fund (IMF) Managing Director Christine Lagarde attends IMFC press conference during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

(L-R) Japan's Deputy Prime Minister and Finance Minister Taro Aso, Britain's Chancellor of the Exchequer Philip Hammond, Zambia's Minister of Finance Margaret Mwanakatwe and Brazil's Finance Minister Eduardo Guardia participate in the International Monetary Fund Governors family photo during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

Finance ministers and central banks governors pose for IMFC family photo during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

IMFC plenary during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

Australian Finance Minister Mathias Cormann (L) and Bahrain's Minister of Finance Ahmed bin Mohammed Al Khalifa attend the Development Committee meeting during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

The International Monetary Fund Governors family photo during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

(L-R) Bank of Canada Governor Stephen Poloz with Federal Reserve Chairman Jerome Powell and Vice President of Switzerland and Finance Minister Ueli Maurer with Indonesia's Central Bank Governor Agus Martowardojo chat at IMFC plenary during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

World Bank President Jim Yong Kim attends the Development Committee meeting during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

U.S. Treasury Secretary Steve Mnuchin speaks at a news conference during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

Senad Softic, Governor of Central Bank of Bosnia and Herzegovina (L) smiles as Ukranian Central Bank Governor Yakiv Smoliy shows his badge to Governor Jorgovanka Tabakovic of National Bank of Serbia before the International Monetary Fund Governors family photo during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

A woman walks outside the International Monetary Fund headquarters building during the IMF/World Bank spring meeting in Washington, U.S., April 20, 2018. REUTERS/Yuri Gripas

Bill Gates, co-chair of the Bill & Melinda Gates Foundation, speaks at a panel discussion on Building Human Capital during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

South Korean Finance Minister Kim Dong-yeon (L), Mongolian Finance Minister Khurelbaatar Chimed and Bayardavaa Bayarsaikhan from Mongolian Central Bank wait for the International Monetary Fund Governors family photo during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

United Arab Emirates Central Bank Governor Mubarak al-Mansoori and International Monetary Fund (IMF) Managing Director Christine Lagarde chat at IMFC plenary during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

Indonesian Finance Minister Sri Mulyani Indrawati (L), World Bank President Jim Yong Kim and International Monetary Fund (IMF) Managing Director Christine Lagarde attend the Development Committee meeting during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.

International Monetary Fund (IMF) Deputy Managing Director David Lipton (L), Irish central bank Governor Philip Lane (C) and Bank for International Settlements (BIS) General Manager Agustin Carstens (2nd R) participate in forum on dealing with booms and busts during the IMF/World Bank spring meeting in Washington, U.S., April 21, 2018.