71% (1984)

53% (1994)

50% (1982)

48% (1993)

0% (1976)

50% (1985)

70% (1980)

0% (1994)

50% (1990)

65% (1977)

83% (1992)

42% (1993)

75% (1993)

65% (1979)

60% (1989)

0% (1995)

0% (1992)

60% (1991)

76% (1988)

60% (1979)