The days when the nation crowded around the radio to listen to the latest new entries, biggest risers and fallers has mostly dwindled with the charts not having the same impact they once did on people's lives.
Such questions were once easy to answer.
Changes in taste help explain some of the trends, though"the advance of technology and new ways of working in music" are also likely to be responsible, experts said.
We have summarized this news so that you can read it quickly. If you are interested in the news, you can read the full text here. Read more: