66% (1982)

72% (1968)

75% (1980)

58% (1979)

72% (1989)

70% (1973)

72% (1976)

65% (1990)

71% (1972)

62% (1983)

59% (1982)

65% (1987)

63% (1976)

59% (1980)

61% (1986)

55% (1999)

72% (1966)

61% (1996)

63% (1988)

55% (1980)