72% (1987)

77% (1986)

68% (1993)

63% (1990)

67% (1986)

74% (1991)

59% (1999)

68% (1973)

60% (1975)

53% (1988)

70% (1999)

64% (2001)

70% (1998)

50% (1988)

90% (1974)

65% (1986)

48% (1974)

0% (1988)

65% (1975)

72% (1996)