7 years. 100+% food inflation. Thanks to the Federal Reserve.

“When the CPI was finally created in 1921 and a time series back to 1913 was established, it would show food prices more than doubling from 1913 to 1920.”

https://www.bls.gov/opub/mlr/2014/article/one-hundred-years-of-price-change-the-consumer-price-index-and-the-american-inflation-experience.htm#:~:text=When%20the%20CPI%20was%20finally,doubling%20from%201913%20to%201920.