I want to know the answer to the following question:
When did Bozeman Airport surpass Billings Logan as the largest busiest in Montana?
All the background I'm provided with is that "Montana's other major Airports include Billings Logan International Airport, Missoula International Airport, Great Falls International Airport, Glacier Park International Airport, Helena Regional Airport, Bert Mooney Airport and Yellowstone Airport.". Is that enough to answer the question?