64% (1973)

64% (1992)

68% (1988)

39% (1972)

52% (1995)

65% (1980)

55% (1981)

52% (1986)

50% (2003)

48% (1974)

51% (1974)

30% (1971)

63% (1966)

50% (1982)

40% (1973)

60% (1971)

63% (1968)

80% (1971)

50% (1970)

50% (1969)