Yes they have yet the mistake is to believe that food prices will continue to go up. While they might have some higher side, there is a limit to what people can spend.
However, to get an idea of historic proportions, just look at the commodity prices of food on 10 and 25 year charts. This will tell you what some of the different food prices are in terms of their all time highs.
https://tradingeconomics.com/commodity/wheat
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