<P> For December 1--December 30, 2015: </P> <Ul> <Li> 4,546,016 people per month (US) </Li> </Ul> <Li> 4,546,016 people per month (US) </Li> <P> Google Ad Planner traffic statistics for Yahoo! Answers, December 2009: </P>

Which type of resource is not an economic factor of production answers.com