75% (1999)

71% (2000)

72% (1984)

74% (1999)

72% (1997)

0% (1987)

70% (1986)

52% (1986)

59% (1983)

0% (1981)

70% (1981)

90% (1992)

0% (1988)

0% (1989)

0% (1980)

0% (1989)

0% (1994)

0% (1992)

0% (1989)

70% (1980)