 Complete the following phrase:  Celtic supporters have traditionally come from the Catholic population of Scotland and people of Irish background, but not exclusively. In 2003, Celtic fans received awards from FIFA and UEFA for their exemplary fair and cordial conduct after 80,000 fans had travelled to Seville for the 2003 UEFA Cup Final. In 2017, Celtic fans were awarded with the FIFA Fan Award for their tifo commemorating the 50th anniversary of the clubs 