Do I calculate US Government interest for 1099-DIV?

TurboTax asks
"Enter the amount of the dividends reported on Form 1099-DIV for VANGUARD MARKETING CORPORATION VANGUARD BROKERAGE that represents interest from U.S. Government obligations."

I don't see this number on the 1099-DIV, so do I need to calculate it? The last page of my 1099-DIV shows PERCENTAGE OF INCOME FROM US GOVERNMENT SECURITIES for each fund that has such securities. Should I multiply these percentages against the Total Dividends & Distributions for each such fund?
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