60% (1991)

70% (1993)

80% (1973)

60% (1990)

0% (1987)

0% (1982)

65% (1992)

62% (1992)

60% (1994)

60% (1993)

60% (1989)

0% (1981)

60% (1986)

60% (1984)

0% (1988)

63% (1979)