53% (1979)

49% (1977)

54% (1981)

53% (1980)

28% (1966)

75% (1974)

55% (1987)

63% (1968)

64% (1980)

56% (1980)

54% (2009)

54% (1982)

65% (2002)

53% (1980)

53% (1988)

52% (1979)

52% (1978)

57% (1975)

48% (1989)

46% (1986)