Average Permian Horizontal Well Production

Our family owns royalties in Howard County. Operators are drilling horizontal wells and we are trying to estimate our royalties as these wells begin production. We know the formula to calculate our royalties, but finding average production for horizontal wells in Howard County has evaded us. Can an expert give us the average historical production for the 1st, 2nd and 3rd years of a horizontal well in Howard County? The wells are 10,000 deep and 2 miles long. We have been told production that 42 to 45% of the total production of a horizontal well is produced the 1st year. Thank you