Quote: Sales figures
In the UK the number of sales required to achieve a hit single has been steadily declining in line with the general decline in single sales. Actual figures vary considerably depending on the time of year. In 2006 a number one single has usually sold around 30,000 copies per week. Sales of around 13,000 have been sufficient to reach the top ten. A single selling over 2,500 copies could make the top forty. These figures have approximately halved since 2002,[2] however, the growing popularity of download single sales in the UK and their recent inclusion in the UK charts indicate that sales are now increasing.[3] | 
