Gross Domestic Product (GDP) for Selected Years
 Year
 Change since previous
 year
 2003
 +2.5%
 2004
 + 3.9%
 2005
 + 3.2%
 2006
 +2.7%
 2007
 + 2.0%
 What is the chart tracking?
 A. Economic growth over a certain period of time
 B. The unemployment rate of workers
 C. The value of goods imported from other countries
 D. The average amount of income per person