region (which includes the surrounding area in addition to the four cities). Economy Wellington Harbour ranks as one of New Zealand's chief seaports and serves both domestic and international shipping. The port handles approximately 10.5 million tonnes of cargo on an annual basis, importing petroleum products, motor vehicles, minerals and exporting meats, wood products, dairy products, wool, and fruit. Many cruise ships also use the port. The Government sector has long been a mainstay of the economy, which has typically risen and fallen with it. Traditionally, its central location meant it was the location of many head offices of various sectors – particularly finance, technology and heavy industry – many of which have since relocated to Auckland following economic deregulation and privatisation. In recent years, tourism, arts and culture, film, and ICT have played a bigger role in the economy. Wellington's median income is well above the average in New Zealand, and the highest of all New Zealand cities. It has a much higher proportion of people with tertiary qualifications than the national average. Major companies with their headquarters in Wellington include: Centreport Chorus Networks Contact Energy The Cooperative Bank Datacom Group Infratil Kiwibank Meridian Energy NZ Post NZX Todd Corporation Trade Me Weta Digital Wellington International Airport Xero Z Energy At the 2013 census, the largest employment industries for Wellington residents were professional, scientific and technical services (25,836 people), public administration and safety (24,336 people), health care and social assistance (17,446 people), education and training (16,550 people) and retail trade (16,203 people). In addition, Wellington is an important centre of the New Zealand film and theatre industry, and second to Auckland in terms of numbers of screen industry businesses. Tourism Tourism is a major contributor to the city's economy, injecting approximately NZ$1.3 billion into the region annually and accounting for 9% of total FTE employment. The city is consistently named as New Zealanders' favourite destination in the quarterly FlyBuys Colmar Brunton Mood of the Traveller survey and it was ranked fourth in Lonely Planet Best in Travel 2011's Top 10 Cities to Visit in 2011. New Zealanders make up the largest visitor market, with 3.6 million visits each year; New Zealand visitors spend on average NZ$2.4 million a day. There are approximately 540,000 international visitors each year, who spend 3.7 million nights and NZ$436 million. The largest international visitor market is Australia, with over 210,000 visitors spending approximately NZ$334