72% (1987)

68% (1993)

77% (1986)

63% (1990)

67% (1986)

59% (1999)

74% (1991)

68% (1973)

48% (1974)

70% (1999)

60% (1975)

50% (1988)

53% (1988)

64% (2001)

0% (1988)

65% (1986)

33% (1987)

70% (1998)

43% (1976)

90% (1974)