Until the start of the 2012-13 season the two Glasgow football clubs known as the Old Firm played in the SPL, Rangers and Celtic. The Old Firm was criticised by some due to the fact that they held such a strong position in Scottish football. The amount of money they made was very large compared to the other teams in Scotland. In 2001 their income was £90 million, almost double the income of the other ten teams, whose income was £48 million combined. Every year since the SPL started one of the Old Firm has won the league. Only once, in the 2005–06 season, did the Old Firm clubs not come first and second in the SPL.