80% (1976)

70% (1990)

62% (1992)

62% (1990)

70% (1977)

0% (1984)

66% (1963)

44% (1999)

64% (2001)

75% (1973)

54% (1989)

69% (1998)

65% (1982)

0% (1972)

68% (1997)

65% (1979)

68% (1991)

47% (1974)

50% (1976)

70% (1963)