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I've seen other charts that reference data from the CDC, but I haven't found anything useful on their site, and they don't return emails.
Only a small time slice, but you can get since 2000 for every country from FAO.
Suite of Food Security Indicators --> http://www.fao.org/faostat/en/#data/FS
Select: United States
Select: "All years"
Click "Download Data" (or pastebin)
Required, but never shown