The first CDs were developed during the 1930s by teams from Great Britain, who dominated ice dance for most of the early years after the sport was contested at the 1952 World Championships. The prominence of the CD in ice dance slowly declined, until it was removed and replaced by the SD in 2011, the year that the ISU voted to restructure ice dance competitions by removing the compulsory dance and original dance (OD) and replacing them with the short dance and free dance (FD).