Mercosur was established in 1991 and encompasses Argentina, Brazil, Paraguay, Uruguay. Venezuela, which officially joined in July 2012 was suspended from membership in 2017. In December 2012, the Protocol of Accession of Bolivia to Mercosur was signed. This protocol is pending ratification by all parliaments in Mercosur countries.
: http://ec.europa.eu/trade/policy/countries-and-regions/regions/mercosur/

