Television news ratings in Australia are collected by three main organisations: OzTAM in metropolitan areas, Regional TAM in regional areas serviced by three commercial television networks, and in areas with two commercial networks, Nielsen Media Research Australia. Ratings are collected for 40 weeks during the year, excluding a two-week break during Easter and ten weeks over summer. The majority of locally produced news and public affairs top the rating charts week after week. History Throughout the early to mid 1980s, Ten Eyewitness News, Network Ten's newscast was the leader in news in the markets of Sydney, Melbourne, Brisbane and Adelaide, mainly because it was the only news service in Australia at the time that was broadcast at 6.00pm, as all the other network's aired their newscast at 6.30pm or 7.00pm, and also because their news service went for one whole hour (a format which remains in use as of today). In descending order, National Nine News, Seven National News, ABC News and World News Tonight, all lagged behind Ten. Falling viewers numbers in the mid-1980s, particularly across the eastern seaboard, led the Seven Network to relaunch both its programming and its news service, which was renamed Seven Nightly News, as part of the network's growing alignment (in terms of branding) with the US network NBC – taking on both the name and well-known theme music (The Mission, composed by John Williams) of NBC's flagship news program, NBC Nightly News. During the worst period of low ratings, Seven Nightly News was forced to move their news to 6.30 pm because National Nine News was too strong in the ratings. Shortly after the 1991 creation of the Seven Network as a company, a national populist current affairs program Real Life was launched, presented by former ABC reporter Stan Grant. It replaced Derryn Hinch's current affair program called Hinch which aired between 1987 and 1991 until moved to Network Ten for another 2 years. Real Life continued until 1995, when it was replaced by state-based editions of the current program Today Tonight. In 1987, National Nine News began over-taking Ten Eyewitness News in the ratings. By 1988, they had taken the lead and was enjoying ratings success nationally. The Nine Network, re-launched A Current Affair in early 1988 with former Ten Eyewitness News anchor Jana Wendt. ACA enjoyed ratings success under Wendt topping the 1991 Australian TV Ratings. Jana left in late 1991