Less than 50

"First of all, let's recognize that this is a once-in-a-half-century, probably once-in-a-century type of event," Greenspan said on ABC's "This Week."

Asked whether the crisis, which has seen the US government step in to bail out mortgage giants Freddie Mac and Fannie Mae, was the worst of his career, Greenspan replied "Oh, by far."

"There's no question that this is in the process of outstripping anything I've seen, and it still is not resolved and it still has a way to go," Greenspan said.
"And indeed, it will continue to be a corrosive force until the price of homes in the United States stabilizes. That will induce a series of events around the globe which will stabilize the system."

Greenspan was also asked whether the United States had a greater-than 50 percent chance of escaping a recession.
"No, I think it's less than 50 percent."

Alan Greenspan, former Chief of the Fed, on the crisis (link)