I wouldn't either. I've not heard of many (actually any, but I'm no expert) states that require jail on a first DUI. And my guess all, at least most, may when someone dies. He wasn't precise, but it's a letter to the editor.
First offense DWI conviction in Alaska is 3 days, 2nd offense 20 days, 3rd off: 60 days, 4th off: 120 days, 5th off: 240 days, 6th off: 360 days. But, if it is a repeat off within the last 10 years, you fall into the Felony category and jail is way steeper.