iTunes now represents an even larger 28 percent of all US music, new NPD data showed today. It grew from 24 percent a year ago to an even larger percentage today and kept its spot as the single largest source of music in the country. Apple's share of digital music was flat, at 70 percent in early 2010, but meant more as customers increasingly moved to digital: downloads have jumped from 35 percent to 40 percent of all US sales.
