Using previous 20 years info and some interpolation:
Region 1 - Fargo Oak Grove > 55% vs. field - OG +20% vs. Richland
Region 2 - Hillsboro - Central Valley and Grafton > 75% vs. field - H-CV +5% vs. Thompson
Region 3 - Carrington and Linton - HMB > 65% vs. field - Carrington +5% vs. Ellendale
Region 4 - Four Winds - Minn. > 55% vs. field
Region 5 - Bismarck Shiloh Christian > 75% vs. field - TLMM +10% vs. Washburn
Region 6 - Minot Ryan > 55% vs. field
Region 7 - Dickinson Trinity and Beulah > 90% vs. field - DT +10% vs. Beulah
Region 8 - Parshall = 50% vs. field