This is roughly a difference of $9 billion in each of those years. Basically, that's taking the level of nominal GDP difference and multiplying it by the 15% average tax rate. Revenues divided by GDP is roughly 15%. So on average government taxed 15% of nominal income. I looked at the sensitivity of employment insurance, and my higher unemployment rate adds about $1 billion. So that's our number.
On March 26th, 2009. See this statement in context.