69% (1973)

45% (1994)

48% (1971)

52% (1996)

75% (1973)

55% (1972)

66% (1980)

56% (1972)

42% (1998)

62% (1972)

73% (1972)

42% (1992)

55% (1980)

43% (1969)

63% (1971)

67% (1971)

52% (1983)

70% (1972)

65% (1972)

30% (1982)