80% (1976)

0% (1990)

70% (1990)

70% (1998)

0% (1986)

64% (2001)

70% (1977)

0% (1983)

44% (1999)

0% (1981)

62% (1992)

0% (1976)

65% (1990)

68% (1997)

0% (1976)

0% (1996)

90% (1961)

0% (1994)

66% (1982)

54% (1973)