59% (2001)

71% (2004)

64% (1997)

59% (1998)

72% (1998)

70% (1978)

60% (1997)

54% (1999)

73% (1999)

64% (1998)

69% (1989)

69% (1985)

69% (2000)

64% (1998)

40% (2002)

65% (1986)

57% (1987)

0% (1988)

0% (1973)

74% (1980)