75% (1999)

74% (1999)

72% (1997)

72% (1984)

71% (2000)

0% (1987)

59% (1983)

52% (1986)

0% (1988)

70% (1986)

0% (1981)

0% (1989)

0% (1994)

0% (1992)

0% (1989)

70% (1981)

90% (1992)

0% (1989)

0% (1982)

0% (1990)