In addition, annuals are often published centered on sports, toys, currently-popular celebrities, recently released films, and popular TV series. In the period of the 1950s to the 1980s, companies like World Distributors, Brown Watson, and Grandreams were known for publishing annuals based on licensed characters and properties. British annuals are also published featuring American characters such as Spider-Man, often with simplified content aimed at younger readers. As tastes in these areas change, so does the line-up of annuals released each year. The increasing emphasis in recent years on annuals of this type (as opposed to the "classic" line-up of annuals based on comics) means that sales remain strong, and, in fact, they doubled between 1998 and 2005. Some annuals have become extremely collectible, especially "The Beano", "The Dandy", "Rupert" and "Eagle".