Context: The top ten best-selling drugs of 2013 totaled $75.6 billion in sales, with the anti-inflammatory drug Humira being the best-selling drug worldwide at $10.7 billion in sales. The second and third best selling were Enbrel and Remicade, respectively. The top three best-selling drugs in the United States in 2013 were Abilify ($6.3 billion,) Nexium ($6 billion) and Humira ($5.4 billion). The best-selling drug ever, Lipitor, averaged $13 billion annually and netted $141 billion total over its lifetime before Pfizer's patent expired in November 2011.

Question: How much money did the top ten bestselling drugs make in 2013?
Answer: $75.6 billion

Question: What was the name of the top-selling anti-inflammatory drug in 2013?
Answer: Humira

Question: What was the bestselling drug in history?
Answer: Lipitor

Question: How much money did Lipitor make before the patent expired?
Answer: $141 billion

Question: In what year did Pfizer's patent over Lipitor expire?
Answer: 2011

Question: How much money did the top ten bestselling drugs make in 2011?
Answer: Unanswerable

Question: What was the name of the top-selling anti-inflammatory drug in 2011?
Answer: Unanswerable

Question: What was the bestselling drug in 2011?
Answer: Unanswerable

Question: How much money did Lipitor make after the patent expired?
Answer: Unanswerable

Question: In what year did Humira's patent over Lipitor expire?
Answer: Unanswerable