Indiana Code Title 8. Utilities and Transportation § 8-14-8-3

(1) A county having a population of more than sixty thousand (60,000) and less than sixty-five thousand (65,000).

(2) A county having a population of more than forty-three thousand five hundred (43,500) and less than forty-five thousand (45,000).

(3) A county having a population of more than thirty-three thousand (33,000) and less than thirty-three thousand one hundred (33,100).

(4) A county having a population of more than thirty-three thousand three hundred (33,300) and less than thirty-four thousand (34,000).

(5) A county having a population of more than twenty-five thousand (25,000) and less than twenty-six thousand (26,000).

(6) A county having a population of more than nineteen thousand (19,000) and less than nineteen thousand eight hundred (19,800).

(7) A county having a population of more than nineteen thousand eight hundred (19,800) and less than nineteen thousand eight hundred fifty (19,850).

(8) A county having a population of more than twelve thousand two hundred (12,200) and less than twelve thousand five hundred (12,500).

(9) A county having a population of more than nine thousand eight hundred (9,800) and less than ten thousand (10,000).

(10) A county having a population of more than ten thousand (10,000) and less than twelve thousand (12,000).