Completed the following sentence: The championships were an annual event until 1990, when it was changed to its current biennial format. <unk> <unk> <unk> <unk> <unk> <unk>
2002 edition to synchronize the event with the other major championships of international athletics.<unk> 2002 edition to synchronize the event with the other major championships of international athletics. ••••••••••••••••••••••