SC Bern is the major ice hockey team of Bern who plays at the PostFinance Arena. The team has ranked highest in attendance for a European hockey team for more than a decade. The PostFinance Arena was the main host of the <answer>2009</answer> IIHF Ice Hockey World Championship, including the opening game and the final of the tournament.
What year was the IIHF Ice Hockey World Championship held in Bern?
2009