CPI annual % change

Source: Central Statistics Office

The Consumer Price Index (CPI) annual % change from 1977 to 2009.

A consumer price index (CPI) is a measure estimating the average price of consumer goods and services purchased by households. A consumer price index measures a price change for a constant market basket of goods and services from one period to the next within the same area (city, region, or nation). It is a price index determined by measuring the price of a standard group of goods meant to represent the typical market basket of a typical urban consumer. - wikipedia