US digital music player sales will grow 35% in 2004 to 18.2 mln units, according to Jupiter Research. The growth will remain above 10% for the next few years, with annual sales hitting 29.7 mln units. The installed base will then reach 56.1 mln units, compared with 16.2 mln now. 90% of US consumers have 1,000 or fewer songs in their digital-music collections, and 60% have less than 200.
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