CPI was calculated and disseminated by the GSO for the first time in 1998 (before, that was retail sale index of goods and services) with the base year 1995.
In 2001, the GSO updated the list of representative goods and services and final consumption weight for calculating CPI with the base year 2000.
In 2006, the GSO updated the list of representative goods and services and final consumption weight for calculating CPI with the base year 2005.
In October 2009, the GSO updated the list of representative goods and services and the weight with the base year 2009.