In general, there can be deficits from plans for a variety of reasons. It's not necessarily that employers are not putting funding into them. Solvency is highly dependent on interest rates and discount rates, because you're discounting the future pension liabilities as if you had to pay them out immediately.
The very low long-term interest rate environment has caused the liabilities of pension plans to be quite large, which is also why our plans are now 109% funded, because of the reversal in interest rates over the last year and a half, and also investment returns. Right now I think plans are probably taking a bit of a beating on the markets, but that's being weighed out by changes in interest rates. It's predominantly market returns and changes to the discount rate that they have to use for their liabilities that can cause plan deficits.