Answer: About 20 times greater.
Step-by-step explanation: When you expand the number in 2005, you get 81 billion. If you round that you get a 100 billion or 100,000,000,000. If you round the number in 2010, you get 2,000,000,000,000. From this you can see the number in 2005 is multiplied by about 20 to get the number in 2010.