Since May 2005, more than 110 million digital music tracks have been downloaded and 81 million tracks were downloaded in 2006 alone, according to music sales tracker Nielsen SoundScan International. In North America, it reported around 600 million digital track sales in 2006, up from 359 million in 2005. Nielsen SoundScan has added over-the-air (OTA) full-track digital download sales from a number of mobile operators in Europe to its European download data reporting. OTA mobile downloads represent a significant portion of digital sales in Europe and, in some countries, the majority of digital sales. It has added PTA digital sales from Telenor in Norway, TDC in Denmark and Vodafone in Spain. It has also added eMusic, Napster and Inprodicon as data providers. Napster is providing digital download sales for the UK and Germany; eMusic is reporting in each of its 14 markets; and Inprodicon provides data on around 40 digital services in Denmark, Finland, Norway and Sweden. Telecompaper: ...