Here is a question about this article: The Greater Richmond area is served by the Richmond International Airport (IATA: RIC, ICAO: KRIC), located in nearby Sandston, seven miles (11 km) southeast of Richmond and within an hour drive of historic Williamsburg, Virginia. Richmond International is now served by nine airlines with over 200 daily flights providing non-stop service to major destination markets and connecting flights to destinations worldwide. A record 3.3 million passengers used Richmond International Airport in 2006, a 13% increase over 2005.
What is the answer to this question: What percentage increase in passenger traffic did Richmond International experience between 2005 and 2006?
13