Kinross and Western Perthshire was a new seat created for the 1918 election.

It was a new seat created as a result of the one vote one value reforms.

This was a new seat created by 114 Stat.

With four new seats created after the 1990 census, that leaves 10 of the state's 23 seats open.

It is the seat of the Bishopric of Créteil, created in 1966.

Like almost all seats created from 1885 it returned one Member of Parliament.

As a result, the open seats created by retirements have become the best opportunities for change in the Senate.

It was a new seat created as a result of the one-vote-one-value reforms.

He transferred to Higgins, one of several new seats created in the 1949 redistribution.

Democrats also held some open seats created by the retirement of Democratic senators.