It is true, American meat consumption has gone down by 34 million pounds. In 1975 the American population was approximately 214,878,866 (I had to estimate between 1970 and 1980) ate an average of 89 lbs ate 19,124,219,030 lbs.
In 2023 the American population was approximately 334,914,895 ate an average of 57 lbs ate 19,090,149,015 lbs.
A difference of 34,070,015 lbs which is a rounding error when you are talking about billions.
But stiil lower average meat consumption is just another sign of the wussification of this country.