51% (2005)

48% (2005)

65% (1982)

62% (1982)

50% (1979)

58% (1982)

43% (1980)

62% (1986)

58% (1995)

50% (1980)

55% (1978)

10% (1976)

62% (1981)

69% (1996)

50% (1987)

64% (1993)

60% (1991)

50% (1976)

60% (1991)

77% (1987)