Letter to the Editor: Changes in food consumption vs. diabetes incidence

To the Editor:
The following information is from the January 29, 2016 issue of the Wall Street Journal, p. A11.
Something to think about:
Let’s look at … “a 2008 report by the Agriculture Department that estimated changes in food consumption from 1970-2005:
Grains rose by 41%.
Vegetable Oils by 91%.
Fish and shellfish by 37%.
Vegetables by 23%.
Fruits by 13%.”
Meanwhile:
“Eggs and red meat each fell by 17%.
And whole milk by 73%.
Yet during roughly the same period, the incidence of diabetes doubled.”
Now, what would a logical person deduce from these statistics?

Bob Moline,
Genoa, WI