49% (1971)

44% (1994)

53% (1996)

56% (1972)

73% (1972)

75% (1973)

68% (1971)

69% (1973)

42% (1998)

62% (1972)

54% (1983)

70% (1972)

56% (1972)

64% (1971)

30% (1982)

59% (1984)

55% (1980)

66% (1972)

43% (1969)

53% (1973)