Question: When was the intergovernmental economic organisation founded in which Obama appointed Karen Kornbluh as the U.S. Ambassador?

Context articles: Gene Cretz
United States Permanent Representative to NATO
Douglas Kmiec
Eileen Donahoe
Karen Teacher Working Group
Maura Connelly
OECD
Stanley Tuemler Escudero
Rashad Hussain
Karen Kornbluh

Gene Allan Cretz (born 1950) is a career diplomat who retired from the Senior Foreign Service in 2015.
 Before retiring, he was the U.S. Ambassador to Ghana.
 Before this, he was the first U.S. Ambassador to Libya since 1972, after being nominated in July 2007 by President Bush.
 His nomination was confirmed by the US Senate on November 21, 2008.
 He was sworn-in as U.S. Ambassador to Libya by Secretary of State Condoleezza Rice on December 17, 2008, at the State Department.
 He arrived in Libya on December 27, 2008.
 Cretz speaks a number of languages, including Arabic, Dari, Urdu, and Chinese.
 President Barack Obama nominated him for the post to Ghana in April 2012.
 He was sworn-in as the U.S. Ambassador to Ghana by Secretary of State Hillary Rodham Clinton on September 11, 2012.
 His retirement ceremony was held at the U.S. State Department on Wednesday, July 1, 2015.
The United States Permanent Representative to NATO (commonly called the U.S. Ambassador to NATO) is the official representative of the United States to the North Atlantic Treaty Organization.
 The Representative has the rank of full ambassador and is appointed by the President and confirmed by the Senate.
 The full official title of the Representative is United States Permanent Representative on the Council of the North Atlantic Treaty Organization, with the rank and status of Ambassador Extraordinary and Plenipotentiary.
 The current U.S. Ambassador to NATO is Kay Bailey Hutchison.
Douglas W. Kmiec (pronounced kah-MECK; born September 24, 1951) is an American legal scholar, author, and former U.S. ambassador.
 He is the Caruso Family Chair and Professor of Constitutional Law at Pepperdine University School of Law.
 Kmiec came to prominence during the United States presidential election, 2008 when, although a Republican, he endorsed Democrat Barack Obama.
 In July 2009, he was nominated by President Obama to serve as U.S. Ambassador to Malta.
 He was confirmed by the Senate and served for close to two years as ambassador to Malta.
 He resigned his post effective May 31, 2011.
Eileen Chamberlain Donahoe is a former U.S. Ambassador to the United Nations Human Rights Council in Geneva, Switzerland, having been appointed by President Barack Obama in 2009.
 (She was the first ambassador following the referent UN body changing from the predecessor United Nations Commission on Human Rights.)
 After serving her term as ambassador, Donahoe was appointed as Director of Global Affairs for Human Rights Watch.
 In 2014, she was also appointed to the board of International Service for Human Rights.
 She is also a former affiliate of Stanford University's Center for International Security and Cooperation.
 .
The Karen Teachers Working Group (KTWG) is an community based organisation founded in 1997 that works to promote and improve education in Karen State.
 The organisation helps to fund Karen Education Department Schools and conducts pre service and in service teacher training.
 KTWG provides assistance to around 1000 KED or mixed authority schools.
Maura Connelly is an American diplomat.
 President Obama nominated Ambassador Connelly, a 25-year veteran of the Foreign Service, as the U.S. Ambassador to the Republic of Lebanon in June 2010.
 Ambassador Connelly was confirmed by the Senate in August 2010 and sworn in by Secretary of State Hillary Clinton in September 2010.
 She officially presented her diplomatic credentials to Lebanese President Michel Sleiman as the 25th U.S. Ambassador to the Republic of Lebanon on September 15, 2010.
The Organisation for Economic Co-operation and Development (OECD; French: "Organisation de coopération et de développement économiques" , "OCDE ") is an intergovernmental economic organisation with 35 member countries, founded in 1960 to stimulate economic progress and world trade.
 It is a forum of countries describing themselves as committed to democracy and the market economy, providing a platform to compare policy experiences, seeking answers to common problems, identify good practices and coordinate domestic and international policies of its members.
 Most OECD members are high-income economies with a very high Human Development Index (HDI) and are regarded as developed countries.
 OECD is an official United Nations Observer.
Stanley Tuemler Escudero (born 10 March 1942) is a retired American diplomat who served in the U.S. foreign service in multiple capacities.
 He was U.S. Ambassador to Tajikistan, 1992–1995, U.S. Ambassador to Uzbekistan, 1995–1997, and U.S. Ambassador to Azerbaijan, 1997-2000.
Rashad Hussain is an American attorney who served as the U.S. Special Envoy of President Barack Obama to the Organisation of Islamic Cooperation (OIC), Deputy Associate White House Counsel, and the U.S. Special Envoy for Strategic Counterterrorism Communications.
 Hussain, a Muslim of Indian heritage, also served on the National Security Council and in the Department of Justice as a trial attorney and as a criminal prosecutor.
 In his role as Envoy to the OIC, the second largest intergovernmental body after the UN, Hussain advised the Obama Administration on policy issues related to the Muslim world.
 He has traveled to numerous countries and international conferences, and has met with foreign leaders and Muslims around the world.
 His position, "a kind of ambassador at large to Muslim countries was created by President George W. Bush," and the Religion News Service profiled Hussain and a member of the President Obama's "spiritual cabinet."
Karen Kornbluh (born 1963) is Executive Vice President of External Affairs at Nielsen, Senior Fellow for Digital Policy at the Council on Foreign Relations and a presidentially-appointed member of the Broadcasting Board of Governors.
 She was previously an American government official, and expert on communications policy, international trade and issues affecting working families.
 Her profile in The New York Times focused on her efforts “Fighting for Economic Equality.”
 A senior adviser to Barack Obama from the beginning of his Senate tenure throughout his 2008 presidential campaign, she has been called "Obama's brain".
 Obama appointed her as the U.S. Ambassador to the OECD.