I want to know the answer to the following question:
What is Oakland Counties rank in affluence in 2009?
All the background I'm provided with is that "But internal county statistical methods – based on measuring per capita income for counties with more than one million residents – show that Oakland is still within the top 12, slipping from the 4th-most affluent such county in the U.S. in 2004 to 11th-most affluent in 2009.". Is that enough to answer the question?
Answer: yes