In recent years, the format has changed but the objectives are still the same.

This season's format for the main event has changed again.

In 1979, the look and format of the books changed.

The format of the service has not changed since 1943.

Over the years, the stories and the format have slowly changed.

The format of the championship has never changed since the start in 2006.

The show's format has slightly changed from the first series.

The format of the show changed for the first time in many years.

A format used for the first time last year has changed that.

The format of the show has changed over the years.