64% (1973)

52% (1995)

65% (1992)

68% (1988)

66% (1980)

40% (1972)

55% (1981)

52% (1986)

50% (1971)

49% (1974)

63% (1966)

50% (2003)

70% (1967)

60% (1971)

60% (1971)

40% (1973)

70% (1966)

50% (1982)

30% (1992)

48% (1974)