I want to know the answer to the following question:
In what year was a group of independent schools found guilty of price-sharing?
All the background I'm provided with is that "In 2005, the Office of Fair Trading found fifty independent schools, including Eton, to have breached the Competition Act by "regularly and systematically" exchanging information about planned increases in school fees, which was collated and distributed among the schools by the bursar at Sevenoaks School.". Is that enough to answer the question?