[TheNightman]

Why would you look at it “per year” when speaking in terms of “per president” other than to say “except trump”

[yellowapple]

Because not all presidents have served for two full terms. Examining things while ignoring the time period over which they happened does not a meaningful analysis make.

[kelnos]

In that case, neither metric is appropriate, and we should be looking for the trend per presidential term.

[LastTrain]

Why would you not?