How long has the league that Eray Cümart plays football in played in its current format?
Eray Cümart: Eray Cümart (* 4 February in Basel) is a Swiss professional footballer who plays as a defender for Sion in the Swiss Super League on loan from Basel. Swiss Super League: The Swiss Super League (known as the Raiffeisen Super League for sponsorship reasons) is a professional league in the top tier of the Swiss football league system and has been played in its current format since the 2003–04 season.
since the 2003–04 season