* Metro Area values for 2009 are set to 100 because 2009 is the base year of index. An index value of 130 indicates a 30% higher GDP than in 2009 in real terms. Indices differ by industries and are not directly comparable.
Years Available: 2001–2016
Permanent Link: http://data.sagepub.com/sagestats/7504
General Notes: Based on the 2007 North American Industry Classification System (NAICS), a set of codes developed by the Office of Management and Budget (OMB] to classify all U.S. businesses. The Quantity Index is a chain-type index time series constructed by the BEA to show how output or spending has changed over time. "Real" estimates remove the effects of price changes, which can obscure changes in output or spending in current dollars. The Quantity Index is set to 100 for each industry categorization and each area for 2009 and the values of the index for other years measure the average percentage change compared with that base year. For more details on calculation methodology, visit http://www.bea.gov/scb/account_articles/national/0398niw/box3.htm. The Quantity Index cannot be used to compare the relative size of GDP between metro areas. Rather, it should be interpreted as a measure of growth or decline in production and is most useful when viewed over time. *Median value gives the value for the "average" metro area for this metric, the 50th percentile of all metro areas for which data values were released. Some values were not released due to privacy concerns; others were not released because they are less than $500,000. Neither of those sets of suppressed values are listed or included in national median. **National Total includes only GDP from metro areas; also known as the "metropolitan portion" of Gross Domestic Product.