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Seats Won by Party
Election Labor Liberal Democrat Green Others Seats
1950 15 14 .. .. 1 30
1955 15 15 .. .. .. 30
1956 15 15 .. .. .. 30
1959 17 16 .. .. 2 35
1964 19 16 .. .. .. 35
1969 17 17 .. .. 1 35
1972 21 14 .. .. .. 35
1976 18 17 .. .. .. 35
1979 20 15 .. .. .. 35
1982 14 19 1 .. 1 35
1986 14 19 .. 2 .. 35
1989 13 17 .. 5 .. 35
1992 11 19 .. 5 .. 35
1996 14 16 .. 4 1 35
1998 14 10 .. 1 .. 25
2002 14 7 .. 4 .. 25
2006 14 7 .. 4 .. 25
2010 10 10 .. 5 .. 25