In Denmark there are various magazines with different frequency types, including weekly magazines, monthly magazines and quarterly magazines. As in other Nordic countries, the national consumer organizations publish their magazines in Denmark. In 2007, there were nearly 68 consumer magazines in the country which were mostly owned by Danish media groups. Of them 52 were monthly/quarterly whereas 16 were weekly. These magazines were grouped into four main categories: general-interest magazines, opinion magazines, TV and radio guides, and professional and scientific magazines.