It is the intent of the Legislature that the practice and cost of referring discovery disputes to outside referees be thoroughly reviewed. Therefore, in addition to the requirements of subdivision (e) of Section 639, the Judicial Council shall collect information from the trial courts on the use of referees in discovery matters pursuant to either Sections 638 and 639. The collected data shall include information on the number of referees, the cost to the parties, and the time spent by the discovery referee. The Judicial Council shall report thereon to the Legislature by July 1, 2003.