80% (1976)

70% (1990)

65% (1982)

64% (2001)

0% (1996)

44% (1999)

62% (1990)

75% (1988)

52% (1997)

0% (1963)

0% (1976)

65% (1979)

69% (1998)

54% (1973)

77% (1979)

69% (1997)

70% (1977)

66% (1963)

60% (1972)

60% (1981)