Professions = { PoliceOfficer = { rare = 1, }, ParkRanger = { rare = 2, }, ConstructionWorker = { }, MilitarySoldier = { rare = 2, }, MilitaryOfficer = { rare = 3, }, SecurityGuard = { }, FireOfficer = { rare = 1, }, Salesperson = { }, ITWorker = { }, OfficeWorker = { }, Unemployed = { }, TruckDriver = { }, Farmer = { }, Cashier = { }, ShopClerk = { }, FastFoodCook = { }, Cook = { rare = 2, }, Chef = { rare = 3, }, Burglar = { rare = 1, }, Drugdealer = { rare = 1, }, Nurse = { rare = 1, }, Doctor = { rare = 2, }, Waiter = { }, CustomerService = { }, Janitor = { }, Secretary = { }, Bookkeeper = { }, Accountant = { }, Teacher = { }, } What does "rare" mean??