There are two components. The actual accounts receivable balance itself related to taxes went up by about $4 billion last year, over the two fiscal years, so that's a big chunk right there. Then you have to look at the rate itself, which increased by about 4% based on the assessments. It is the two components. The base receivable we're talking about here is $25 billion to $30 billion in the 2006-07 year.
On November 20th, 2007. See this statement in context.