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This statistic shows the consumer price index for urban consumers in the United States from April 2011 to April 2012. The data represents U.S. city averages. The base period was 1982-84=100. The CPI is defined by the United States Bureau of Labor Statistics as "a measure of the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services." In April 2012, the unadjusted CPI amounted to 230 which was an increase by 2.3 percent compared to April 2011.