The data are compiled by Nielsen Soundscan based on each album's weekly physical and digital sales.
One of which, American R&B singer Beyoncé's self-titled visual album started its peak in late 2013.
[1] The soundtrack to the 2013 Disney film, Frozen was the longest-running number-one album of the year, staying atop the chart for thirteen non-consecutive weeks.
[2] Taylor Swift's 1989 sold 1.28 million copies in its first week, making it the second album with the highest sales during the opening week, since 2002 when Eminem's third album, The Eminem Show opened up with 1.3 million.
[3] Between the weeks of December 6 and 13, the Billboard 200 switched from tracking pure album sales to album-equivalent units.