(1) It is an Chained Coincident Annual Laspeyres Index , by which its base changes yearly. (2) Year base 2000
Source
Central Reserve Bank, The Department of Balance of Payments (Based on information from the General Direction of Customs, the Transactions Unit (UT), the Oil Refinery at Acajutla (RASA), The Central American Monetary Council, and The Central Bank of Central America).