In 2003 Germans had 51.4 million televisions, or 623.6 per 1,000 people. The Association of Public Broadcasting Corporations, known as ARD, is responsible for the “first” German television channel, and ZDF (Second German Television) provides an alternative. ARD also sponsors a third regional channel, including, for example, Westdeutscher Rundfunk (West German Broadcasting) and Norddeutscher Rundfunk (North German Broadcasting). Also in 2003, the number of VHF radio receivers was estimated at 225 million, which corresponds to 45 million households with an average of five receivers. ARD manages Deutsche Welle, the only federal public radio station in Germany. ARD and ZDF charge fees: access to public radio and television costs US$19.57 per month, while access to public radio alone costs US$6.45 per month. In 1984 public television began to compete with the private sector for the first time when two privately funded television stations, Mainz-based SAT.1 and Cologne-based RTL, went on the air. Various media companies have established other television channels available via cable, satellite, and even terrestrial (over-the-air) frequencies. The private networks do not charge fees but rather depend on advertising for their revenues. In 2003 Germany had 276 private radio stations with a total of more than a half-million listeners.