66% (1988)

51% (1994)

62% (1993)

63% (1991)

54% (1988)

60% (1993)

60% (1995)

64% (1989)

65% (1985)

62% (1985)

0% (1996)

65% (1994)

64% (1986)

65% (1987)

68% (1990)