The top 10 list is based on the number of CDs sold.In considering music services, which sell many single songs, the researcher uses an equivalency of 12 tracks per album.

• 前十的排名主要是基于出售的CD数量，而当处理音乐服务时，对于出售的单曲的情况，研究人员以每张CD为12首单曲计算。