Administration of the Philippine islands were considered a drain on the economy of Spain, and there were debates about abandoning it or trading it for some other territory. However, this was opposed for a number of reasons, including economic potential, security, and the desire to continue religious conversion in the islands and the surrounding region. The Philippines survived on an annual subsidy provided by the Spanish Crown, which averaged 250,000 pesos and was usually paid through the provision of 75 tons of silver bullion being sent from the Americas.