A recent survey of readers in 17 Colombian cities conducted by the Asociación Colombiana de Investigación de Medios (ACIM) shows that El Tiempo is the most popular Colombian newspaper with 1,519,000 readers (Mon-Fri) and 2,728,200 (Sundays), followed by El Espacio (528,300 readers). The study factors in newspapers passed along from one reader to the next instead of looking only at circulation. El Tiempo's circulation is 314,000 (Mon-Fri) and 453,000 (Sundays). In the city of Medellín, El Colombiano is the most widely read newspaper (348,300 daily readers), and in Barranquilla El Heraldo (335,500) leads the pack. Among financial newspapers, Portafolio continues to be the leader (90,300 financial dailies), followed by La República (27,400).