Crynodeb o'r cais
These tables gives index values used to calculate the impact of implementing methodological improvements to the Consumer Prices Index (CPI) and CPI including owner occupiers' housing costs (CPIH). The improvements are the introduction of an additional level of aggregation (COICOP5) and applying a double price update to the chain linking methodology. The index values given are those at the start of the series (2005) and those at the end of the series (2014).