Shipping in and out of Pago Pago experienced an economic boom from 1970 to 1974. Flights into Pago Pago International Airport continued to increase in the early 1970s, with the Office of Tourism reporting 40,000 visitors and calling for the construction of additional hotels. Service to American Samoa by air was offered by Pan American (four weekly flights), Air New Zealand (four weekly flights), and UTA (four weekly flights). From 1974 to 1975, records show that 78,000 passengers moved by air between the two Samoas and that Polynesian Airlines collected $1.8 million from the route. Pago Pago Harbor became a popular stop for yachts in the early 1970s.