Melbourne is the capital city of the state of Victoria and has the second highest population of any city in Australia. It is a leading financial centre in Australia as well as in the Asia Pacific. The Economist Intelligence Unit has ranked Melbourne as the World’s most liveable city. Melbourne is often referred to as the Cultural Capital of Australia with a strong emphasis on theatre and the Arts as well as having a worldwide reputation for the quality and diversity of its restaurants. It has the largest tram system outside of Europe, originally named as Batmania. The first ever set of traffic lights in Australia were installed in Melbourne. Until the year 1966 pubs in Melbourne closed at 6:00pm. Melbourne has the highest number of restaurants and cafes per number of people than any other city in the world. According to the Crimes Act of 1958, if you meet up with a Pirate in Melbourne, you must not trade with them. The City of Melbourne's population is made up of many groups of people of all ages and from many different cultures. Residents include young professionals, international students and older couples looking to enjoy everything the city has to offer. On an average weekday around 909,000 people use the city, and each year Melbourne hosts over a million international visitors.