DULUTH, MN (KDAL) - Duluth Airport officials have announced the 2012 passenger numbers and they show a 9 percent increase over the previous year.  Over 322 thousand passengers makes last year the 2nd busiest in the history of the Duluth Airport trailing only 2007.  Executive Director Tom Werner says they are happy travelers all across the region are embracing the many air service options now available from Duluth.  A new state-of-the-art passenger terminal just opened for business on January 14th.