A year-end report by Nielsen SoundScan
, which tracks retail activity, states that compact disc sales through December 22, 2002, were off 9.3% compared to the same period the previous year, with 624.2 million units sold compared to 688.2 sold in 2001. Of all recorded music sold, 94% of it was on CD, the remainder on cassette tape and vinyl records. An insignificant amount of music was sold as legitimate downloads from industry-sponsored music sites. SoundScan did not expect the last week of December to impact the year's total.