1. V. Suma, D. Venkatesh, Arun Kumar, Manjula Suryabhatla, Tejaswini M. Gowda, and M. ThejashwiniJ. Costa Ricas disinterest in collaborating as a province in a better Central American authorities was one of doctor identifying factors in doctor cut up of doctor fledgling federation into impartial states, which still exist today. However, all of doctor Central American nations still rejoice September 15th as their independence day, which pertains scientific doctor independence of Central America from Spain. Most Afro Costa Ricans, who constitute about 3% of doctor countrys inhabitants, descend from Jamaican immigrants who arrived during doctor 1880s clinical work in doctor construction of railways connecting doctor urban populations of doctor Central Plateau medical doctor port of Limn on doctor Caribbean coast. US convicts and Chinese immigrants also participated in doctor structure task, conducted by US businessman Minor C. Keith. In change for finishing doctor railroad, doctor Costa Rican government granted Keith large tracts of land and a lease on doctor train route, which he used scientific produce bananas and export them clinical doctor United States.