Because of the increased presence of duopolies and outsourcing agreements since the early 2000s, the number of minor network affiliates and independent stations that produce their own newscasts has markedly decreased compared to when duopolies were barred under Federal Communications Commission rules prior to 2000 (as of 2013, there are at least 15 minor network affiliates or independent stations that produce their own local newscasts, most are located within the 20 largest U.S. media markets). Duopolies and outsourcing agreements have also affected Fox stations in a similar manner; although Fox is considered to be a major network on the same level as NBC, ABC, and CBS and has urged its affiliates since the early 1990s to broadcast local news, about half of its stations broadcast local news programming through news share agreements with many of the remainder operating their own news departments. Several stations affiliated with Spanish-language networks (such as Univision and Telemundo) also broadcast their own newscasts, these stations often produce a substantially lower weekly newscast output compared to its English-language counterparts (usually limited to half-hour broadcasts in the evening, and often airing only on weeknights).