The Consumer Price Index (CPI) measures the average prices of goods and services purchased by consumers. In the United States, the CPI-U calculates the CPI for all urban consumers.
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From March 2010 to September 2010,there was greater month-to-month variability in the "All items" category than in the "All items less food and energy" category.
The CPI-U for electricity increased 0.5% from July to August 2010.
There was no change in the CPI-U for all items less food and energy from May 2010 to September 2010.