The rate of release settled very quickly to three per year: one release around late March/early April, another around late July and a third around late November. Over a hundred "main series" (not including spin-off and special edition) albums have been released to date. The UK series has followed a double-album format throughout the series (many other foreign franchises of the "Now!" series are only released on one disc), now exploiting the capacity of the CD to include between 40 and 46 tracks over two discs. Since November 2005 ("Now That's What I Call Music! 62"), the "Now!" series have only been released on CD and digital download formats. Previously, the series had been available on vinyl, cassette and MiniDisc, until these formats declined in popularity.