sentences:  After the signing of the Protocol Number 20, in 1987, no further action was ever taken by any of the countries to effectively put the currency into use.Mercosur, an economic bloc including Brazil and Argentina, establishing broader economic integration, was created in 1991, without any initial plans to establish a common currency.Later, in 1994, Brazil established the Brazilian real, still in use, putting an end to the frequent currency changes that took place in the country throughout the 1980s and the 1990s.