For the first time since the opening of the iTunes Music Store in 2003, digital music sales have decreased year-over-year, reports Billboard. In 2013, sales of individual digital tracks declined 5.7% from 1.34 billion units to 1.26 billion units, while digital album sales fell to 117.6 million units from 117.7 million units in 2012. The report notes that industry executives have cited music streaming services for the regression in digital music sales. While industry executives initially refused to attribute the early signs this year of digital sales weakness to
