Mr. Speaker, the consumer price index, CPI, is an indicator of changes in consumer prices experienced by Canadian residents. It is obtained by comparing, over time, the costs of a fixed basket of goods and services purchased by consumers. Data by quintile are not and have never been compiled for the CPI on an ongoing basis, as the CPI is meant to represent a measure of overall consumer inflation.
In the House of Commons on March 6th, 2014. See this statement in context.