In my example, comma or no comma before the word respectively?

In the graph for all arrests, and DUI arrests, the effect of the MLDA is about 125 and 50 increase in arrests rate respectively.

I personally think no comma should be put before the word respectively. And what about the comma before the phrase and DUI arrests? Should I remove it? I want to say there is one graph for each and make that clear.

So maybe I should change the first part of the sentence to something like: .

In both graphs for all arrests and DUI arrests, the effect of the MLDA is about a 125 and 50 increase in arrests rate respectively.

Solution 1:

Only one comma is required in the sentence, and that is after DUI arrests. The phrases all arrests and DUI arrests make up a coordinated complement of the preposition for, and a comma would only serve to separate them. The final word respectively is an integral part of the clause in which it occurs, and should not be separated from the rest of it.