The Economic Community of West African States (ECOWAS; also known as in French and Portuguese) is a regional political and economic union of fifteen countries located in West Africa. Collectively, these countries comprise an area of , and in 2015 had an estimated population of over 349 million. Considered one of the pillar regional blocs of the continent-wide African Economic Community (AEC), the stated goal of ECOWAS is to achieve "collective self-sufficiency" for its member states by creating a single large trade bloc by building a full economic and trading union. The union was established on 28 May 1975, with the signing of the Treaty of Lagos, with its stated mission to promote economic integration across the region. A revised version of the treaty was agreed and signed on 24 July 1993 in Cotonou. The ECOWAS also serves as a peacekeeping force in the region, with member states occasionally sending joint military forces to intervene in the bloc's member countries at times of political instability and unrest. Member states As of February 2017, ECOWAS has 15 member states; eight of these are French-speaking, five are English-speaking, and two Portuguese-speaking. All current members joined the community as founding members in May 1975, except Cape Verde which joined in 1977. The only former member of ECOWAS is Arabic-speaking Mauritania, which was also one of the founding members in 1975 and decided to withdraw in December 2000. Mauritania recently signed a new associate-membership agreement in August 2017. Morocco officially requested to join ECOWAS in February 2017. The application was endorsed in principle at the summit of heads of state in June 2017, but Morocco's bid for membership was stalled. Mali was suspended from ECOWAS on 30 May 2021, following its second military coup within nine months. Guinea was also suspended on 8 September 2021, shortly after a military coup took place in the country. Sanctions were placed on both countries on 16 September. On 10 January 2022, Mali announced to close its borders and recalled several ambassadors with ECOWAS in response to sanctions imposed for deferring elections for four years. On 28 January 2022, Burkina Faso was suspended from ECOWAS following a military coup. Statistics for population, nominal GDP and purchasing power parity GDP listed below are taken from World Bank estimates for 2015, published in December 2016. Area data is taken from a 2012 report compiled by the United Nations Statistics Division.